CN211186566U - Mattress with one-way valve - Google Patents
Mattress with one-way valve Download PDFInfo
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- CN211186566U CN211186566U CN201922452865.2U CN201922452865U CN211186566U CN 211186566 U CN211186566 U CN 211186566U CN 201922452865 U CN201922452865 U CN 201922452865U CN 211186566 U CN211186566 U CN 211186566U
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Abstract
The utility model relates to a mattress with a one-way valve. The splicing structure of the prior mattress has air leakage after being disassembled, so that the air cushion layer is broken and damaged during carrying. The utility model discloses an air cushion layer and air pump box through pipeline through even, the pipeline includes grafting structure, leading nest of tubes and rearmounted nest of tubes, and grafting structure includes socket and plug, is equipped with the check valve in the plug, pegs graft the back that targets in place, and the check valve pressurized removes to the station of ventilating by the shutoff station to make the high-pressure gas in the leading nest of tubes carry to rearmounted nest of tubes through grafting structure. The plug is internally provided with the one-way valve, the plug and the socket are disassembled, and then the rear pipe group is plugged by the one-way valve, so that the air cushion layer is prevented from being broken due to air deficiency deformation, the air cushion layer is convenient to carry, and the service life of the air cushion layer is prolonged.
Description
Technical Field
The utility model relates to a bedding field, concretely relates to mattress.
Background
The existing inflatable mattress comprises an air cushion layer and an external air pump box, the air pump box is communicated with the air cushion layer through a pipeline, the air pump box generates high-pressure air and inputs the air cushion layer through the pipeline, and the hardness of the mattress is controlled by adjusting the air pressure in the air cushion layer. In order to promote the bearing comfort, the air cushion layer comprises a plurality of regions capable of independently controlling air pressure, so that the pipeline comprises a plurality of unit pipes which are not communicated with each other, and in addition, in order to facilitate the dismounting and carrying, the pipeline comprises an internal pipe set arranged in the air pump box and an external pipe set exposed out of the air pump box, and the pipeline is dismounted to realize convenient transportation. However, this structure has the following drawbacks: the air cushion layer need keep its profile in the transportation, and in handling, need be with external nest of tubes and built-in nest of tubes separation, lead to the air in the air cushion layer to leak for the condition of buckling damage takes place easily for the air cushion layer.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a take mattress of check valve through set up the check valve in grafting structure, both conveniently peg graft and aerify, still conveniently ensure after dismantling that the air cushion layer keeps the gas filled state, and convenient transportation promotes to use and experiences.
The utility model discloses a following mode realizes: the utility model provides a take mattress of check valve, includes air cushion layer and the external air pump box that arranges the air cushion layer in, is equipped with the air pump in the air pump box, the air pump leads to between air pump and air cushion layer through the pipeline, the pipeline includes leading nest of tubes and the rearmounted nest of tubes that leads to through the grafting structure, the grafting structure includes the socket that leads to with leading nest of tubes gas outlet and leads to the plug that links to each other with rearmounted nest of tubes air inlet, is equipped with the check valve in the plug, pegs graft after target in place, and the check valve pressurized removes to the station of ventilating by the shutoff station to make the high-pressure gas in leading nest of tubes carry to rearmounted nest of tubes. Set up the check valve in the plug, the plug is pegged graft with the socket and is realized air pump and air cushion layer and lead to even, both promoted the hardness on air cushion layer through increasing air cushion layer atmospheric pressure, promotes and uses the travelling comfort, can also utilize the check valve to come the rear nest of tubes of shutoff through dismantling behind plug and the socket, ensures that the air cushion layer can not take place the condition of rolling over the damage because of the deformation of lacking of gas, convenient transport, extension air cushion layer life.
Preferably, the plug comprises a shell and a one-way pipe arranged in the shell, the front end of the one-way pipe is exposed and is used for the socket to be connected, the middle section of the one-way pipe forms a limiting cavity for the one-way valve to slide, and the rear end of the one-way pipe is communicated with the rear pipe group. The one-way pipe not only has the function of communicating with the rear pipe group, but also has the function of being inserted into the socket. The limiting cavity has a movable limiting effect on the one-way valve, so that the one-way valve can move freely and has the effect of plugging the rear pipe group, the one-way valve is prevented from being lost due to separation from the one-way pipe, and the use stability of the one-way valve is ensured.
Preferably, the check valve comprises a valve body sliding along the axis of the limiting cavity and a spring clamped between the valve body and the rear end face of the limiting cavity, and the spring pushes the valve body forwards so that the front end face of the valve body is in sealing fit with the front end face of the limiting cavity. The valve body can axially move in the limiting cavity so that the valve body is switched between a plugging station attached to the front end face of the limiting cavity and a ventilation station separated from the front end face of the limiting cavity. The spring pushes the valve body forward and closely laminates with terminal surface before the spacing chamber, ensures that the valve body is in the shutoff station all the time when not receiving exogenic action, ensures that the air cushion layer can be isolated with external space when plug and socket break away from, prevents that the air cushion layer from taking place the condition of default deformation.
Preferably, the one-way pipe is of a split structure and is in a reducing shape with two thin ends and a thick middle section, a front opening communicated with the front end of the one-way pipe is formed in the middle of the front end face of the limiting cavity, the middle of the front end face of the valve body extends forwards to form a transmission pipe, the front end of the transmission pipe forwards penetrates through the front opening and is exposed out of a front port of the one-way pipe, and after the one-way pipe is installed in place, the transmission pipe is in contact communication with the socket through the front end, so that the transmission pipe moves backwards and drives the valve body to be switched to the ventilation station from the plugging station. The front end of the transmission pipe is exposed out of the one-way pipe and used for sensing the assembly state between the plug and the socket, and when the plug and the socket are installed, the transmission pipe can drive the valve body to be separated from the front end face of the limiting cavity due to contact with the socket, so that the front pipe group is communicated with the rear pipe group.
Preferably, the rear end part of the transmission pipe is provided with a vent hole, and when the valve body is positioned at a ventilation station, high-pressure gas in the transmission pipe flows into the limiting cavity through the vent hole so as to enable the front pipe group to be communicated with the rear pipe group. When the valve body is switched to the ventilation station from the sealing station, the rear end part of the transmission pipe is positioned in the limiting cavity, and the ventilation hole plays a role in communicating the inner cavity of the transmission pipe with the limiting cavity, so that the front pipe group is ensured to be communicated with the rear pipe group.
Preferably, the diameter of the outer side wall of the transmission pipe is matched with the diameter of the inner side wall of the front end part of the one-way pipe, and the diameter of the valve body is smaller than that of the limiting cavity, so that the valve body can move in a suspension mode along the axis of the limiting cavity. The laminating is matchd with the driving pipe lateral wall to tip inside wall before the check tube, plays radial spacing and axial guide effect to the driving pipe, ensures that the valve body can realize the axial switching between station and shutoff station of ventilating with the suspension gesture in spacing intracavity. A gap for air flow circulation exists between the valve body and the wall surface of the limiting cavity.
Preferably, the diameter of the valve body is larger than that of the front opening, so that the front end face of the valve body is positioned on the peripheral area of the transmission pipe to form an annular sealing surface, and when the valve body is in the plugging station, the sealing surface is tightly attached to the periphery of the front opening. The valve body can axially block the front opening completely, and the sealing performance is improved by increasing the radial overlapping distance between the front end face of the valve body and the periphery of the front opening.
Preferably, the socket comprises a base body, wherein a fixed connection pipe is arranged on the base body, the front end part of the fixed connection pipe is communicated with the front pipe group, and the rear end part of the fixed connection pipe is provided with a socket for inserting the front end part of the one-way pipe. The fixed connection pipe has the functions of communicating with the preposed pipe group and communicating with the one-way pipe in an inserting mode.
Preferably, screw holes which are arranged backwards are formed in two sides of the seat body, studs which can be screwed forwards are arranged on two sides of the plug, and after the plug is inserted in place, the studs are screwed and locked in the screw holes, so that the front end port of the one-way pipe is hermetically communicated with the corresponding sockets. The stud is screwed and locked with the screw hole, so that the front end of the one-way pipe is tightly inserted into the socket, the effect of pushing the transmission pipe backwards is achieved, and the valve body can overcome the elastic reset acting force from the spring and is positioned at the ventilation station.
Preferably, the preposed pipe group comprises at least two preposed single pipes, the postposed pipe group comprises postposed single pipes matched with the preposed single pipes in number, and after the preposed single pipes are inserted in place, the preposed single pipes are in butt joint with the corresponding postposed single pipes one by one. The air cushion layer is provided with a plurality of independent subareas which can independently control air pressure, and each independent subarea is provided with a front single tube and a rear single tube which correspond one by one, so that the air pressure in each independent subarea can be independently adjusted.
The utility model has the advantages that: set up the check valve in the plug, the plug is pegged graft with the socket and is realized air pump and air cushion layer and lead to even, both promoted the hardness on air cushion layer through increasing air cushion layer atmospheric pressure, promotes and uses the travelling comfort, can also utilize the check valve to come the rear nest of tubes of shutoff through dismantling behind plug and the socket, ensures that the air cushion layer can not take place the condition of rolling over the damage because of the deformation of lacking of gas, convenient transport, extension air cushion layer life.
Drawings
FIG. 1 is a partial cross-sectional schematic view of the mattress;
FIG. 2 is a schematic view of an assembly structure of the air pump box;
FIG. 3 is a disassembled view of the plugging structure;
FIG. 4 is a schematic cross-sectional view of the plug and receptacle when separated;
FIG. 5 is a schematic cross-sectional view of the plug and the socket;
in the figure: 1. the air cushion layer comprises an air cushion layer 2, an air pump box 3, a front pipe group 4, a rear pipe group 5, a socket 6, a plug 7, a one-way valve 8, a one-way pipe 9, a limiting cavity 10, a valve body 11, a spring 12, a transmission pipe 13, an air vent 14, a seat body 15, a fixed connection pipe 16, a socket 17 and a stud.
Detailed Description
The essential features of the invention will be further explained below with reference to the drawings and the detailed description of the invention.
As shown in fig. 1 and 2, the mattress with the check valve comprises an air cushion layer 1 and an air pump box 2 externally arranged on the air cushion layer 1, an air pump is arranged in the air pump box 2, the air pump is communicated with the air cushion layer 1 through a pipeline, the pipeline comprises a front pipe group 3 and a rear pipe group 4 which are communicated through a plugging structure, the plugging structure comprises a socket 5 communicated with an air outlet of the front pipe group 3 and a plug 6 communicated with an air inlet of the rear pipe group 4, a check valve 7 is arranged in the plug 6, and after the plugging is in place, the check valve 7 is pressed and moved to a ventilation station through a plugging station, so that high-pressure air in the front pipe group 3 is conveyed to the rear pipe group 4 through the plugging structure. Set up check valve 7 in plug 6, plug 6 is pegged graft with socket 5 and is realized air pump and air cushion layer 1 and lead to even, both promote the hardness of air cushion layer 1 through increasing air cushion layer 1 atmospheric pressure, promote and use the travelling comfort, can also utilize check valve 7 to come the rear nest of tubes 4 of shutoff through utilizing behind dismantling plug 6 and socket 5, ensure that air cushion layer 1 can not take place the condition of losing because of the deformation of lacking the air, convenient transport, extension air cushion layer 1 life.
In practical operation, the mattress comprises a mattress body and an air pump box 2 externally arranged on the mattress body, wherein a spring 11 layer and an air cushion layer 1 arranged on the spring 11 layer are arranged in the mattress body. The air pump in the air pump box 2 generates high-pressure air and transmits the high-pressure air into the air cushion layer 1 through a pipeline. The pipeline is including setting up leading nest of tubes 3 in air pump box 2 and setting up rearmounted nest of tubes 4 outside air pump box 2, and the front port of leading nest of tubes 3 leads to with the air pump gas outlet, and the rear port of rearmounted nest of tubes 4 leads to with air cushion layer 1, leads to between the front port of leading nest of tubes 3 and rearmounted nest of tubes 4 through grafting structure.
In actual operation, the grafting structure is including plug 6 and the socket 5 of pluggable dismouting, when carrying or saving the mattress, need to fill up the body and 2 splits of air pump box, specifically, realize the mounting box and fill up the body separation through disassembling plug 6 and socket 5, and plug 6 utilizes the check valve 7 of locating in it to realize that rearmounted nest of tubes 4 keeps apart with external space, make air cushion layer 1 can keep atmospheric pressure invariable under the condition that air pump box 2 breaks away from, and then ensure that the profile of air cushion layer 1 keeps invariable, can not take place the condition of losing because of excessively buckling, increase of service life.
In practical operation, the socket 5 includes a base 14 fixedly connected to the air pump box 2, the base 14 is provided with a fixing pipe 15 (as shown in fig. 3), a front end of the fixing pipe 15 is communicated with the front pipe group 3, and a rear end is provided with a socket 16 for inserting the front end of the one-way pipe 8. The socket 16 is arranged outwards, and an annular step for abutting against the front end of the transmission pipe 12 is arranged in the socket 16.
When the plug 6 is separated from the socket 5 (as shown in fig. 4), the check valve 7 in the plug 6 is in a plugging station, and at this time, the periphery of the front end surface of the valve body 10 is pushed down by the elastic restoring force of the spring 11 to be closely overlapped on the periphery of the front opening, so as to prevent the air in the air cushion layer 1 from leaking outwards, the vent hole 13 is hidden in the front end portion of the check tube 8, and the front port of the transmission tube 12 is exposed out of the front port of the check tube 8.
When the plug 6 is assembled with the socket 5 (as shown in fig. 5), the plug 6 is inserted into the corresponding socket 16 by the front end of the exposed one-way tube 8, because the front end of the transmission tube 12 protrudes out of the front port of the one-way tube 8, the transmission tube 12 drives the valve body 10 to move backwards due to the collision of the front end surface and the step surface, in the process that the valve body 10 moves backwards, the spring 11 is pressed and accumulates elastic restoring force, the vent hole 13 moves along with the rear end of the transmission tube 12 and is exposed in the limit cavity 9, so that the limit cavity 9 is communicated with the inner cavity of the transmission tube 12 through the vent hole 13, and after the plug is in place, the front end surface of the transmission tube 12 is flush with the front port of the one-way tube 8 and is collided with the step surface, so that the front tube group 3.
In practical operation, after the plug 6 and the socket 5 are matched and plugged, the plug and the socket are screwed and locked through the stud 17. Specifically, screw holes which are opened backwards are formed in two sides of the seat body 14, studs 17 which can be screwed forwards are arranged on two sides of the plug 6, and after the plug is inserted in place, the studs 17 are screwed and locked in the screw holes, so that the front end opening of the one-way pipe 8 is communicated with the corresponding sockets 16 in a sealing mode. The studs 17 are at least two and are arranged separately, so that the connection stability is improved by adding connection points, and the condition that the one-way pipe 8 is leaked due to separation from the socket 16 is prevented.
In practical operation, the plug 6 comprises a shell and a one-way pipe 8 arranged in the shell, the front end of the one-way pipe 8 is exposed and is used for the socket 5 to be connected, the middle section of the one-way pipe forms a limiting cavity 9 for the one-way valve 7 to slide, and the rear end of the one-way pipe is connected with the rear pipe group 4. The check pipe 8 is of a split structure and is in a reducing shape with thin two ends and thick middle section, and the diameter of the limiting cavity 9 is larger than that of the front section and the rear section of the check pipe 8, so that the limiting cavity 9 for limiting the excessive displacement of the valve body 10 is formed in the middle of the check pipe 8.
In actual operation, a front opening communicated with the front end of the one-way pipe 8 is formed in the middle of the front end face of the limiting cavity 9, a transmission pipe 12 is formed by extending the middle of the front end face of the valve body 10 forwards, the front end of the transmission pipe 12 forwards penetrates through the front opening and is exposed out of the front port of the one-way pipe 8, and after the valve body is installed in place, the transmission pipe 12 is communicated with the socket 5 in a butting mode through the front end, so that the transmission pipe 12 moves backwards and drives the valve body 10 to be switched from a plugging station to a ventilation station. For convenience in installation, the one-way pipe 8 is of a split structure, and a valve body 10 and a spring 11 are conveniently installed in the limiting cavity 9. The middle part of the front end face of the valve body 10 extends forwards to form a transmission pipe 12, the periphery of the transmission pipe forms an annular sealing surface sealed with the periphery of the front opening, and the periphery of the rear opening is used for providing axial supporting acting force for the spring 11, so that the spring 11 can drive the valve body 10 to move to a plugging station by using the self elastic restoring force.
In actual operation, the check valve 7 comprises a valve body 10 sliding along the axis of the limit cavity 9 and a spring 11 clamped between the valve body 10 and the rear end face of the limit cavity 9, and the spring 11 pushes the valve body 10 forward so that the front end face of the valve body 10 is in sealing fit with the front end face of the limit cavity 9. The diameter of the outer side wall of the transmission pipe 12 is matched with the diameter of the inner side wall of the front end part of the one-way pipe 8, and the diameter of the valve body 10 is smaller than that of the limiting cavity 9, so that the valve body 10 can move in a suspended mode along the axis of the limiting cavity 9. The diameter of the valve body 10 is larger than that of the front opening, so that the front end face of the valve body 10 is located in the peripheral area of the transmission pipe 12 to form an annular sealing surface, and when the valve body 10 is located at a plugging station, the sealing surface is tightly attached to the periphery of the front opening. The axis of the anterior segment lumen of the one-way tube 8 and the axis of the spacing cavity 9 are overlapped, when the transmission tube 12 axially slides along the anterior segment of the one-way tube 8, the valve body 10 can slide along the spacing cavity 9, an annular ventilation channel is formed between the outer peripheral wall of the valve body 10 and the inner side wall of the spacing cavity 9, and the connection between the preposed tube group 3 and the postpositive tube group 4 is ensured.
In practical operation, the rear end part of the transmission pipe 12 is provided with a vent hole 13, and when the valve body 10 is located at a ventilation station, high-pressure gas in the transmission pipe 12 flows into the limiting cavity 9 through the vent hole 13 so as to communicate the front pipe group 3 with the rear pipe group 4. The vent hole 13 is formed at the joint of the tail end of the transmission pipe 12 and the front end face of the valve body 10, so that high-pressure airflow from the front pipe group 3 can be obtained after the valve body 10 is separated from the periphery of the front opening, and the adjustment sensitivity is ensured. The through-hole is two at least, and sets up along the periphery equidistance of driving pipe 12, ensures the gas transmission stability.
In practical operation, the preposed tube group 3 comprises at least two preposed single tubes, the postposed tube group 4 comprises postposed single tubes matched with the preposed single tubes in number, and after the preposed single tubes are inserted in place, the preposed single tubes are in butt joint with the corresponding postposed single tubes one by one. The number of the front single tubes, the number of the fixed connection tubes, the number of the one-way valves and the number of the rear single tubes are matched with the number of the independent partitions and correspond to the independent partitions one by one, so that each independent partition can be independently adjusted in air pressure.
In actual operation, all be provided with the sealing washer between the adjacent part that needs sealed intercommunication, ensure high-pressure gas's conveying efficiency from this, prevent to influence air cushion layer 1 and adjust the precision because of pipeline gas leakage, promote to use and experience.
Claims (10)
1. The utility model provides a take mattress of check valve, includes air cushion layer (1) and external air pump box (2) of arranging air cushion layer (1), is equipped with the air pump in air pump box (2), air pump and air cushion layer (1) are led to through the pipeline between, the pipeline includes leading nest of tubes (3) and rearmounted nest of tubes (4) of connecting through grafting structure, its characterized in that, grafting structure includes socket (5) that lead to even with leading nest of tubes (3) gas outlet and plug (6) that lead to even with rearmounted nest of tubes (4) air inlet, is equipped with check valve (7) in plug (6), pegs graft the back that targets in place, and check valve (7) pressurized removes to the station of ventilating by the shutoff station to make the high-pressure gas in leading nest of tubes (3) carry to rearmounted nest of tubes (4) through grafting structure.
2. The mattress with the one-way valve as claimed in claim 1, wherein the plug (6) comprises a shell and a one-way pipe (8) arranged in the shell, the front end of the one-way pipe (8) is exposed and is used for the socket (5) to be plugged and communicated, the middle section of the one-way pipe forms a limiting cavity (9) for the one-way valve (7) to slide, and the rear end of the one-way pipe is communicated with the rear pipe group (4).
3. The mattress with the one-way valve as claimed in claim 2, wherein the one-way valve (7) comprises a valve body (10) sliding along the axis of the limiting cavity (9) and a spring (11) clamped between the valve body (10) and the rear end face of the limiting cavity (9), and the spring (11) pushes the valve body (10) forwards so that the front end face of the valve body (10) is in sealing fit with the front end face of the limiting cavity (9).
4. The mattress with the one-way valve according to claim 3, wherein the one-way pipe (8) is of a split structure and is in a reducing shape with two thin ends and a thick middle section, the middle part of the front end surface of the limiting cavity (9) is provided with a front opening communicated with the front end of the one-way pipe (8), the middle part of the front end surface of the valve body (10) extends forwards to form a transmission pipe (12), the front end of the transmission pipe (12) passes forwards through the front opening and is exposed out of the front end of the one-way pipe (8), and after the installation is in place, the transmission pipe (12) is in contact communication with the socket (5) through the front end, so that the transmission pipe (12) moves backwards and drives the valve body (10) to be switched from the plugging station to the ventilation station.
5. The mattress with the one-way valve as recited in claim 4, characterized in that the rear end of the transmission tube (12) is provided with a vent hole (13), and when the valve body (10) is located at the ventilation station, high-pressure gas in the transmission tube (12) flows into the limiting cavity (9) through the vent hole (13) so as to communicate the front tube group (3) with the rear tube group (4).
6. The mattress with the one-way valve as recited in claim 4, characterized in that the diameter of the outer side wall of the transmission tube (12) is matched with the diameter of the inner side wall of the front end part of the one-way tube (8), and the diameter of the valve body (10) is smaller than that of the limiting cavity (9) so that the valve body (10) can move in a suspending way along the axis of the limiting cavity (9).
7. A mattress with one-way valves according to claim 4, characterized in that the diameter of the valve body (10) is larger than the diameter of the front opening, so that the front end surface of the valve body (10) is located at the peripheral area of the transmission tube (12) to form an annular sealing surface, and the sealing surface is tightly attached to the peripheral edge of the front opening when the valve body (10) is in the plugging station.
8. A mattress with a one-way valve according to any one of claims 1 to 7, wherein the socket (5) comprises a base body (14), a fixing tube (15) is arranged on the base body (14), the front end of the fixing tube (15) is communicated with the front tube group (3), and the rear end is provided with a socket (16) for inserting the front end of the one-way tube (8).
9. The mattress with the one-way valve as claimed in claim 8, wherein screw holes are formed in two sides of the seat body (14) and are opened backwards, screw studs (17) capable of being screwed forwards are formed in two sides of the plug (6), and after the plug is inserted in place, the screw studs (17) are screwed and locked in the screw holes, so that the front end of the one-way pipe (8) is in sealed communication with the corresponding sockets (16).
10. The mattress with the one-way valve as recited in claim 8, characterized in that the front tube group (3) comprises at least two front single tubes, the rear tube group (4) comprises rear single tubes with the number matching with the number of the front single tubes, and after the front single tubes are inserted into the front single tubes, the front single tubes are butted with the corresponding rear single tubes one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922452865.2U CN211186566U (en) | 2019-12-26 | 2019-12-26 | Mattress with one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922452865.2U CN211186566U (en) | 2019-12-26 | 2019-12-26 | Mattress with one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211186566U true CN211186566U (en) | 2020-08-07 |
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ID=71859621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922452865.2U Active CN211186566U (en) | 2019-12-26 | 2019-12-26 | Mattress with one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211186566U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112434825A (en) * | 2020-11-11 | 2021-03-02 | 浙江力拓环保工程有限公司 | Intelligent dangerous waste warehouse |
-
2019
- 2019-12-26 CN CN201922452865.2U patent/CN211186566U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112434825A (en) * | 2020-11-11 | 2021-03-02 | 浙江力拓环保工程有限公司 | Intelligent dangerous waste warehouse |
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