CN214668418U - Smoke and fume tester - Google Patents
Smoke and fume tester Download PDFInfo
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- CN214668418U CN214668418U CN202120858470.7U CN202120858470U CN214668418U CN 214668418 U CN214668418 U CN 214668418U CN 202120858470 U CN202120858470 U CN 202120858470U CN 214668418 U CN214668418 U CN 214668418U
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Abstract
The utility model discloses a smoke and dust smoke tester, include: the body is used for detecting smoke dust and smoke; the accommodating box comprises an accommodating body and a cover body, wherein the cover body is connected with the box body in an overturning manner, and the box body is also provided with a roller which is positioned at the edge of one side of the bottom of the box body; the push-pull subassembly is located the bottom of box, including parallel arrangement's first telescopic link and second telescopic link, first telescopic link is connected with the bottom of box, and the second telescopic link is connected with the bottom of box, and the push-pull subassembly still includes the connecting rod, and the one end of gyro wheel is kept away from with first telescopic link to the one end of connecting rod is connected, and the other end of connecting rod is kept away from the one end of gyro wheel with the second telescopic link and is connected. The utility model discloses a smoke and dust smoke tester can reduce the fatigue strength when carrying.
Description
Technical Field
The utility model relates to a detecting instrument's technical field, in particular to smoke and dust gas tester.
Background
The smoke dust and smoke gas tester is a portable instrument, and adopts a method of constant-speed sampling and filter membrane (filter cylinder) weighing to measure the mass concentration of smoke dust; measuring O with sensors of electrochemical or optical principles2、SO2Mass concentrations of toxic and harmful gases such as NOx and CO; and measuring parameters such as flue gas flow velocity, flue gas temperature, flue gas humidity, flue pressure exhaust volume and the like.
The smoke and fume tester is suitable for detecting the emission concentration, the emission total amount, the dust removal and desulfurization efficiency and the like of smoke and fume in the emission of a fixed source.
However, the existing smoke and smoke tester is portable for a long time in the carrying process, and is easy to cause fatigue.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a smoke and dust smoke tester can reduce the fatigue strength when carrying.
According to the utility model discloses a smoke and dust smoke tester of first aspect embodiment, include: the body is used for detecting smoke dust and smoke; the accommodating box is used for accommodating the body and comprises a box body and a cover body connected with the box body in an overturning way, and the box body is also provided with a roller which is positioned at the edge of one side of the bottom of the box body; the push-pull assembly is arranged at the bottom of the box body and comprises a first telescopic rod and a second telescopic rod which are arranged in parallel, the first telescopic rod is arranged on the bottom surface of the box body in parallel, the second telescopic rod is arranged on the bottom surface of the box body in parallel, the push-pull assembly further comprises a connecting rod, one end of the connecting rod is connected with one end, far away from the roller, of the first telescopic rod, and the other end of the connecting rod is connected with one end, far away from the roller, of the second telescopic rod.
According to the utility model discloses flue gas tester has following beneficial effect at least: through setting up the body, the body is used for detecting the smoke and dust flue gas for smoke and dust flue gas tester can possess the detection function.
Simultaneously, set up and hold the case, hold case holding body to, can effectively accomodate the protection body.
Moreover, the containing box is provided with a box body and a cover body connected with the box body in a turnover mode, so that the containing box is convenient to open and close.
In addition, the box still is provided with the gyro wheel, and the gyro wheel is located the edge of bottom half one side to, when needs remove the tester, can remove through dilatory box, avoid long-time portable, reduce the fatigue strength when carrying.
Simultaneously, through installation push-and-pull subassembly in the bottom half, the push-and-pull subassembly includes parallel arrangement's first telescopic link and second telescopic link, first telescopic link parallel arrangement is in the bottom surface of box, second telescopic link parallel arrangement is in the bottom surface of box, thereby, through changing the length of first telescopic link and second telescopic link, can adapt to the user push-and-pull operation of different heights, in addition, the push-and-pull subassembly still includes the connecting rod, the one end of connecting rod is kept away from the one end of gyro wheel with first telescopic link and is connected, the other end of connecting rod is kept away from the one end of gyro wheel with the second telescopic link and is connected, thereby, on the one hand, the connecting rod activity can drive first telescopic link and the synchronous flexible of second telescopic link, on the other hand, the connecting rod can be used for handheld, make things convenient for push-and-pull operation.
According to some embodiments of the utility model, the first telescopic link includes sliding connection's first pole and second pole, the first pole with the bottom fixed connection of box, the second pole with the connecting rod is connected.
The beneficial results are: through setting up first telescopic link into sliding connection's first pole and second pole to, realize the flexible function of first telescopic link, in addition, the bottom fixed connection of first pole and box, the second pole is connected with the connecting rod, thereby, the box can be kept away from and be close to the connecting rod, adapts to the user push-and-pull operation of different heights.
According to some embodiments of the invention, the first rod is provided with a first groove, which accommodates the first rod to slide.
The beneficial results are: through setting up first groove at first pole, the first pole of first groove holding slides to, on the one hand, first groove can be spacing to first pole, and on the other hand, can make full use of the inner space of first pole, reduces second pole occupation space, and the structure is compacter.
According to some embodiments of the utility model, the second pole is provided with the shell fragment, the shell fragment is kept away from the one end of second pole is provided with the convex part, first pole is provided with the holding the concave part of convex part, the shell fragment drives the convex part inserts the concave part, the convex part with concave part cooperation location.
The beneficial results are: through set up the shell fragment at the second pole, set up the convex part in the one end that the second pole was kept away from to the shell fragment, set up the concave part of holding convex part at first pole, convex part and concave part cooperation location to, the flexible length of fixed first telescopic link, in addition, the shell fragment can drive the convex part and insert the concave part, avoids the convex part to break away from the concave part.
According to some embodiments of the utility model, the second pole is provided with the second groove, the shell fragment sets up the second inslot, the lateral wall in second groove is provided with first through-hole, first through-hole holding the convex part.
The beneficial results are: through setting up the second groove at the second pole, the shell fragment setting is at the second inslot for the second pole can make full use of inner space arrange the shell fragment, reduces and occupies the exterior space, and in addition, the lateral wall in second groove sets up first through-hole, first through-hole holding convex part, thereby, make the convex part through the cooperation of first through-hole back with the concave part, avoid the lateral wall in second groove to hinder the cooperation of convex part and concave part.
According to some embodiments of the present invention, the push-pull assembly further comprises a third rod, the third rod is disposed in the second groove, one end of the third rod is abutted to the elastic piece, the other end of the third rod extends in a direction away from the elastic piece, and the third rod moves to drive the elastic piece away from the first rod.
The beneficial results are: through setting up the third pole in the second groove, the one end and the shell fragment butt of third pole, the other end of third pole extends the setting along the direction of keeping away from the shell fragment, and the first pole is kept away from to the third pole removal drive shell fragment to, can drive the shell fragment through removing the third pole outside the second groove and keep away from the first pole, conveniently control first pole and second pole relative slip or relatively fixed.
According to some embodiments of the utility model, the connecting rod is provided with the third groove, the third groove with the second groove intercommunication, the push-and-pull subassembly still includes the fourth rod, the fourth rod sets up in the third groove, the one end of fourth rod with the third pole is connected, the third groove is close to one side of shell fragment is provided with the spring, the spring with fourth rod butt, the spring drives the fourth rod is kept away from the shell fragment.
The beneficial results are: through setting up the third groove at the connecting rod, third groove and second groove intercommunication, set up the fourth rod at the third groove, the one end and the third pole of fourth rod are connected, thereby, the fourth rod can drive the activity of third pole, in addition, one side that the third groove is close to the shell fragment sets up the spring, spring and fourth rod butt, the shell fragment is kept away from to the spring drive fourth rod, thereby, the fourth rod drives the third pole and keeps away from the shell fragment, and then, avoid the third pole to drive the shell fragment and keep away from first pole, especially when first pole and second pole need be fixed.
According to some embodiments of the utility model, the fourth rod is kept away from one side of spring is provided with the boss, the lateral wall of connecting rod is provided with the holding the second through-hole of boss.
The beneficial results are: the boss is arranged on one side, far away from the spring, of the fourth rod, the second through hole for accommodating the boss is formed in the side wall of the connecting rod, so that the boss can extend to the outer side of the connecting rod through the second through hole, and the fourth rod is convenient to press and move.
According to the utility model discloses a some embodiments, the bottom of box still is provided with the support column, support column and ground contact, the height of support column is greater than the height of gyro wheel.
The beneficial results are: through setting up the support column in the bottom of box, support column and ground contact, the height that highly is greater than the gyro wheel of support column to, the gyro wheel drives the box and removes when putting the box of placing flatly.
According to some embodiments of the utility model, the case lid is provided with the hasp, the box is provided with the holding the catch of hasp, the hasp with the catch cooperation will the case lid with the box locking.
The beneficial results are: through setting up the hasp at the case lid, the box sets up the catch of holding hasp, and hasp and catch cooperation are with case lid and box locking to, make things convenient for sealed tester, especially when the tester is idle.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a smoke and smoke tester according to an embodiment of the present invention;
figure 2 is a cross-sectional view of the push-pull assembly shown in figure 1.
Reference numerals: 100-body, 110-containing box, 120-box body, 130-cover body, 140-roller, 150-push-pull assembly, 160-first telescopic rod, 170-second telescopic rod, 180-connecting rod, 190-first rod, 200-second rod, 210-first groove, 220-spring sheet, 230-convex part, 240-concave part, 250-second groove, 260-first through hole, 270-third rod, 280-third groove, 290-fourth rod, 300-spring, 310-boss, 320-second through hole, 330-support column, 340-lock catch and 350-lock ring.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A smoke and smoke tester according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1, the present invention provides a smoke and smoke tester, which includes a body 100, a containing box 110 and a push-pull assembly 150.
For the body 100, the body 100 is used to detect smoke fumes.
This embodiment is through setting up body 100, and body 100 is used for detecting the smoke and dust flue gas for smoke and dust flue gas tester can possess the detection function.
For the accommodating box 110, the accommodating box 110 accommodates the body 100, the accommodating box 110 includes a box body 120 and a cover 130 connected to the box body 120 in a flip manner, the box body 120 is further provided with a roller 140, and the roller 140 is located at an edge of one side of the bottom of the box body 120.
In this embodiment, the accommodating box 110 is provided, and the accommodating box 110 accommodates the body 100, so that the protection body 100 can be effectively accommodated.
Also, the receiving box 110 is provided with a box body 120 and a cover body 130 which is coupled to the box body 120 in a flip manner, thereby facilitating the opening and closing of the receiving box 110.
In addition, the box body 120 is further provided with a roller 140, and the roller 140 is located at the edge of one side of the bottom of the box body 120, so that when the tester needs to be moved, the tester can be moved by dragging the box body 120, long-time hand-holding is avoided, and the fatigue strength during carrying is reduced.
In some specific embodiments, a support column 330 is further disposed at the bottom of the box 120, the support column 330 is in contact with the ground, and the height of the support column 330 is greater than the height of the roller 140.
In the embodiment, the supporting columns 330 are arranged at the bottom of the box body 120, the supporting columns 330 contact with the ground, and the height of the supporting columns 330 is greater than that of the rollers 140, so that the rollers 140 are prevented from driving the box body 120 to move when the box body 120 is placed horizontally.
In some embodiments, the cover is provided with a latch 340 and the housing 120 is provided with a catch 350 that receives the latch 340, the latch 340 and catch 350 cooperating to lock the cover to the housing 120.
In the embodiment, the lock catch 340 is arranged on the case cover, the lock ring 350 for accommodating the lock catch 340 is arranged on the case body 120, and the lock catch 340 and the lock ring 350 are matched to lock the case cover and the case body 120, so that the tester can be conveniently sealed, particularly when the tester is idle.
Referring to fig. 2, for the push-pull assembly 150, the push-pull assembly 150 is installed at the bottom of the box body 120, the push-pull assembly 150 includes a first telescopic rod 160 and a second telescopic rod 170 which are arranged in parallel, the first telescopic rod 160 is arranged at the bottom of the box body 120 in parallel, the second telescopic rod 170 is arranged at the bottom of the box body 120 in parallel, the push-pull assembly 150 further includes a connecting rod 180, one end of the connecting rod 180 is connected with one end of the first telescopic rod 160 away from the roller 140, and the other end of the connecting rod 180 is connected with one end of the second telescopic rod 170 away from the roller 140.
In this embodiment, the push-pull assembly 150 is installed at the bottom of the box 120, the push-pull assembly 150 includes a first telescopic rod 160 and a second telescopic rod 170 which are arranged in parallel, the first telescopic rod 160 is arranged in parallel on the bottom surface of the box 120, the second telescopic rod 170 is arranged in parallel on the bottom surface of the box 120, thereby, by changing the lengths of the first telescopic rod 160 and the second telescopic rod 170, the push-pull operation of users with different heights can be adapted, in addition, the push-pull assembly 150 further includes a connecting rod 180, one end of the connecting rod 180 is connected with one end of the first telescopic rod 160 far away from the roller 140, the other end of the connecting rod 180 is connected with one end of the second telescopic rod 170 far away from the roller 140, thereby, on one hand, the connecting rod 180 can drive the first telescopic rod 160 and the second telescopic rod 170 to synchronously extend and retract, on the other hand, the connecting rod 180 can be used for holding, and is convenient for push-pull operation.
In some embodiments, the first extension bar 160 includes a first bar 190 and a second bar 200 slidably connected, the first bar 190 is fixedly connected to the bottom of the housing 120, and the second bar 200 is connected to the connection bar 180.
In the embodiment, the first telescopic rod 160 is provided as the first rod 190 and the second rod 200 which are slidably connected, so that the telescopic function of the first telescopic rod 160 is realized, in addition, the first rod 190 is fixedly connected with the bottom of the box body 120, and the second rod 200 is connected with the connecting rod 180, so that the connecting rod 180 can be far away from and close to the box body 120, and the push-pull operation of users with different heights is adapted.
Further, the first rod 190 is provided with a first groove 210, and the first groove 210 accommodates the first rod 190 to slide.
In the embodiment, the first groove 210 is disposed on the first rod 190, and the first groove 210 accommodates the first rod 190 to slide, so that, on one hand, the first groove 210 can limit the first rod 190, and on the other hand, the inner space of the first rod 190 can be fully utilized, the occupied space of the second rod 200 is reduced, and the structure is more compact.
In addition, the second rod 200 is provided with a spring plate 220, one end of the spring plate 220, which is far away from the second rod 200, is provided with a convex part 230, the first rod 190 is provided with a concave part 240 for accommodating the convex part 230, the spring plate 220 drives the convex part 230 to be inserted into the concave part 240, and the convex part 230 and the concave part 240 are matched and positioned.
In this embodiment, the elastic piece 220 is disposed on the second rod 200, the protruding portion 230 is disposed on one end of the elastic piece 220 away from the second rod 200, the concave portion 240 for accommodating the protruding portion 230 is disposed on the first rod 190, and the protruding portion 230 and the concave portion 240 are matched for positioning, so as to fix the telescopic length of the first telescopic rod 160, and in addition, the elastic piece 220 can drive the protruding portion 230 to be inserted into the concave portion 240, thereby preventing the protruding portion 230 from separating from the concave portion 240.
In some specific embodiments, the second rod 200 is provided with a second groove 250, the resilient piece 220 is disposed in the second groove 250, a side wall of the second groove 250 is provided with a first through hole 260, and the first through hole 260 receives the protrusion 230.
In this embodiment, the second groove 250 is formed in the second rod 200, and the elastic sheet 220 is disposed in the second groove 250, so that the second rod 200 can make full use of the inner space to arrange the elastic sheet 220, thereby reducing the occupied outer space, in addition, the side wall of the second groove 250 is provided with the first through hole 260, and the first through hole 260 accommodates the convex portion 230, so that the convex portion 230 can be matched with the concave portion 240 after passing through the first through hole 260, and the side wall of the second groove 250 is prevented from blocking the matching between the convex portion 230 and the concave portion 240.
In some embodiments, the push-pull assembly 150 further includes a third rod 270, the third rod 270 is disposed in the second groove 250, one end of the third rod 270 abuts against the resilient plate 220, the other end of the third rod 270 extends in a direction away from the resilient plate 220, and the movement of the third rod 270 moves the resilient plate 220 away from the first rod 190.
This embodiment is through setting up third pole 270 in second groove 250, the one end and the shell fragment 220 butt of third pole 270, and the other end of third pole 270 extends the setting along the direction of keeping away from shell fragment 220, and the removal of third pole 270 drives shell fragment 220 and keeps away from first pole 190 to, can drive shell fragment 220 and keep away from first pole 190 through removing third pole 270 outside second groove 250, conveniently control first pole 190 and second pole 200 relative slip or relatively fixed.
Further, the connecting rod 180 is provided with a third groove 280, the third groove 280 is communicated with the second groove 250, the push-pull assembly 150 further comprises a fourth rod 290, the fourth rod 290 is arranged in the third groove 280, one end of the fourth rod 290 is connected with the third rod 270, one side of the third groove 280 close to the elastic piece 220 is provided with a spring 300, the spring 300 is abutted against the fourth rod 290, and the spring 300 drives the fourth rod 290 to be far away from the elastic piece 220.
This embodiment is through setting up third groove 280 at connecting rod 180, third groove 280 communicates with second groove 250, set up fourth rod 290 at third groove 280, the one end and the third pole 270 of fourth rod 290 are connected, thereby, fourth rod 290 can drive the activity of third pole 270, in addition, one side that third groove 280 is close to shell fragment 220 sets up spring 300, spring 300 and fourth rod 290 butt, spring 300 drives fourth rod 290 and keeps away from shell fragment 220, thereby, fourth rod 290 drives third pole 270 and keeps away from shell fragment 220, and then, avoid third pole 270 to drive shell fragment 220 and keep away from first pole 190, especially when first pole 190 and second pole 200 need be fixed.
In some embodiments, the side of the fourth rod 290 away from the spring 300 is provided with a boss 310, and the side wall of the connecting rod 180 is provided with a second through hole 320 for receiving the boss 310.
In this embodiment, the boss 310 is disposed on one side of the fourth rod 290 away from the spring 300, and the sidewall of the connecting rod 180 is disposed with the second through hole 320 for accommodating the boss 310, so that the boss 310 can extend to the outer side of the connecting rod 180 through the second through hole 320, and further, the fourth rod 290 is conveniently pressed and moved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The utility model provides a smoke and dust gas tester which characterized in that includes:
a body (100) for detecting smoke;
the accommodating box (110) is used for accommodating the body (100) and comprises a box body (120) and a cover body (130) connected with the box body (120) in a turnover mode, the box body (120) is further provided with rollers (140), and the rollers (140) are located on the edge of one side of the bottom of the box body (120);
the push-pull assembly (150) is installed at the bottom of the box body (120) and comprises a first telescopic rod (160) and a second telescopic rod (170) which are arranged in parallel, the first telescopic rod (160) is fixed on the bottom surface of the box body (120) in parallel, the second telescopic rod (170) is fixed on the bottom surface of the box body (120) in parallel, the push-pull assembly (150) further comprises a connecting rod (180), one end of the connecting rod (180) is connected with one end, away from the roller (140), of the first telescopic rod (160), and the other end of the connecting rod (180) is connected with one end, away from the roller (140), of the second telescopic rod (170).
2. The smoke and smoke tester of claim 1, wherein said first telescoping rod (160) comprises a first rod (190) and a second rod (200) slidably connected, said first rod (190) being fixedly connected to the bottom of said box (120), said second rod (200) being connected to said connecting rod (180).
3. A smoke and smoke tester as claimed in claim 2 wherein said first rod (190) is provided with a first slot (210), said first slot (210) accommodating said first rod (190) in sliding movement.
4. The smoke and smoke tester of claim 2, wherein the second rod (200) is provided with a spring (220), one end of the spring (220) far away from the second rod (200) is provided with a convex part (230), the first rod (190) is provided with a concave part (240) for accommodating the convex part (230), the spring (220) drives the convex part (230) to be inserted into the concave part (240), and the convex part (230) and the concave part (240) are matched and positioned.
5. The smoke and smoke tester of claim 4, wherein said second rod (200) is provided with a second groove (250), said spring plate (220) is arranged in said second groove (250), a side wall of said second groove (250) is provided with a first through hole (260), and said first through hole (260) accommodates said protrusion (230).
6. The smoke and smoke tester of claim 5, wherein said push-pull assembly (150) further comprises a third rod (270), said third rod (270) is disposed in said second slot (250), one end of said third rod (270) abuts against said spring plate (220), the other end of said third rod (270) extends in a direction away from said spring plate (220), and said third rod (270) moves to drive said spring plate (220) away from said first rod (190).
7. The smoke and smoke tester of claim 6, wherein said connecting rod (180) is provided with a third slot (280), said third slot (280) is communicated with said second slot (250), said push-pull assembly (150) further comprises a fourth rod (290), said fourth rod (290) is disposed in said third slot (280), one end of said fourth rod (290) is connected with said third rod (270), one side of said third slot (280) close to said elastic sheet (220) is provided with a spring (300), said spring (300) abuts against said fourth rod (290), and said spring (300) drives said fourth rod (290) away from said elastic sheet (220).
8. The smoke and smoke tester of claim 7, wherein a side of said fourth rod (290) away from said spring (300) is provided with a boss (310), and a side wall of said connecting rod (180) is provided with a second through hole (320) for receiving said boss (310).
9. The smoke and smoke tester of claim 1, wherein a support column (330) is further disposed at the bottom of the box (120), the support column (330) is in contact with the ground, and the height of the support column (330) is greater than the height of the roller (140).
10. The smoke and smoke tester as claimed in claim 1, wherein said cover (130) is provided with a lock catch (340), said box (120) is provided with a lock ring (350) for receiving said lock catch (340), said lock catch (340) and said lock ring (350) cooperate to lock said cover (130) and said box (120).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202120858470.7U CN214668418U (en) | 2021-04-23 | 2021-04-23 | Smoke and fume tester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202120858470.7U CN214668418U (en) | 2021-04-23 | 2021-04-23 | Smoke and fume tester |
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CN214668418U true CN214668418U (en) | 2021-11-09 |
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CN202120858470.7U Active CN214668418U (en) | 2021-04-23 | 2021-04-23 | Smoke and fume tester |
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2021
- 2021-04-23 CN CN202120858470.7U patent/CN214668418U/en active Active
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