CN107816642A - A kind of new LED for being easy to adjust intensity of light - Google Patents
A kind of new LED for being easy to adjust intensity of light Download PDFInfo
- Publication number
- CN107816642A CN107816642A CN201711048145.9A CN201711048145A CN107816642A CN 107816642 A CN107816642 A CN 107816642A CN 201711048145 A CN201711048145 A CN 201711048145A CN 107816642 A CN107816642 A CN 107816642A
- Authority
- CN
- China
- Prior art keywords
- shell
- led
- pipe
- inwall
- round bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
- F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
- F21V11/14—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures with many small apertures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a kind of new LED for being easy to adjust intensity of light, including shell and LED lamp panel, the inwall of the shell is fixedly connected with lampshade, the lampshade is located at the underface of LED lamp panel, round bar is connected with the circular hole that the cover top portion opens up, knob is fixedly connected with the top of the round bar, the surface activity of the round bar is socketed with back-moving spring, the both ends of the back-moving spring overlap with the bottom of knob and the upper surface of shell respectively, the surface activity of the round bar is socketed with pipe, the pipe is located at the inside of shell, fixed cover is connected to sliding bearing and guidance tape successively from top to bottom on the surface of the pipe.The present invention is by setting round bar, knob, back-moving spring, pipe, guidance tape, disk, fixed block and light barrier, the LED solved in the market adjusts the brightness of LED by non-polar dimmer mostly, the quality of LED is compromised, adjusts the problem of intensity of light is cumbersome.
Description
Technical field
The present invention relates to LED technical field, specially a kind of new LED for being easy to adjust intensity of light.
Background technology
The basic structure of LED is one piece of electroluminescent chip of semiconductor material, LED have low energy consumption, long lifespan,
Without many merits such as stroboscopic, impact resistance and environmental protection, it is widely used in numerous necks such as mobile phone, desk lamp, building, household electrical appliances and machinery production
Domain.
During general manufacturer production LED, the rated current of setting makes LED reach optimal luminescent point, and efficiency highest
Point, brightness and the electric current of LED be not linear in reality, such as reduces the brightness of half, it is possible to the only electricity of saving 10%
Can, and reduce brightness for a long time and use, LED light decay is produced and had a strong impact on, shortens the service life of LED, not
Reach the effect of energy-conservation, LED in the market compromises LED mostly by the brightness of non-polar dimmer regulation LED
Quality, regulation intensity of light it is cumbersome.
The content of the invention
（One）The technical problem of solution
In view of the shortcomings of the prior art, the invention provides a kind of new LED for being easy to adjust intensity of light, solve at present
The LED of in the market adjusts the brightness of LED by non-polar dimmer mostly, compromises the quality of LED, adjusts intensity of light
The problem of cumbersome.
（Two）Technical scheme
To achieve the above object, the present invention provides following technical scheme：A kind of new LED for being easy to adjust intensity of light, bag
Shell and LED lamp panel are included, the inwall of the shell is fixedly connected with lampshade, and the lampshade is located at the underface of LED lamp panel, described
Round bar is connected with the circular hole that cover top portion opens up, knob, the table of the round bar are fixedly connected with the top of the round bar
Face movable sleeve is connected to back-moving spring, and the both ends of the back-moving spring overlap with the bottom of knob and the upper surface of shell respectively, institute
The surface activity for stating round bar is socketed with pipe, and the pipe is located at the inside of shell, and the surface of the pipe is from top to bottom successively
Fixed cover is connected to sliding bearing and guidance tape, and the outer wall of the sliding bearing is fixedly connected with the surface of fixing pipe, the fixation
Pipe is fixedly connected on the top of outer casing inner wall, and fixed cover is connected to disk and gear successively from top to bottom on the surface of the round bar, institute
The top and bottom that disk and gear are located at pipe respectively are stated, the lower surface of the disk is fixedly connected with fixed block, the circle
Offer slot at the top of pipe, the inwall of the shell opens up fluted, and the inwall of the groove is connected with light barrier, institute
The upper surface for stating light barrier offers through hole, and the inwall of the through hole offers teeth groove, and the inwall of the teeth groove engages with gear,
The upper surface of the light barrier offers perforation, and groove is offered at the top of the shell, and the inwall of the groove is flexibly connected
There is guide plate, the guide plate is fixedly connected on the side of LED lamp panel, and the opening position that the LED lamp panel corresponds to guidance tape is fixed
It is connected with guide rod.
Preferably, the distance between the lower surface of the disk and pipe top are equal to bottom and the upper surface of outer cover of knob
The distance between, and the distance is equal to the thickness of gear.
Preferably, the edge of the light barrier has circular groove, and the inwall of the circular groove is connected with ball, the circle
The surface of ball and the inwall of groove overlap.
Preferably, the guidance tape is in left hand helix shape, and the quantity of the guide rod is two, two guide rods with
The position of guidance tape is adapted.
Preferably, the surface of the guide rod is fixedly connected with the inwall of rolling bearing, the surface of the rolling bearing with
The surface overlap joint of guidance tape.
Preferably, the quantity of the perforation is two groups, and the quantity of every group of perforation is five, the diameter of five perforation
Into Geometric Sequence, and proportionality coefficient is 0.85.
Preferably, perforation described in two groups is that pivot is in the symmetrically quantity of the LED lamp panel using the center of circle of through hole
For two, perforated described in two groups respectively with two LED lamp panel position correspondences.
Preferably, the fixed block and slot are cylindrical, and 1 point 5 times of a diameter of fixed block diameter of slot,
The lower surface of the fixed block is spherical.
（Three）Beneficial effect
The invention provides a kind of new LED for being easy to adjust intensity of light, possesses following beneficial effect：
（1）, the present invention by setting round bar, knob, back-moving spring, pipe, guidance tape, disk, fixed block and light barrier, rotate
Knob, knob drive light barrier to rotate by round bar and gear, can adjust the size of perforation immediately below LED lamp panel, and perforation is got over
Greatly, light transmittance is higher, otherwise lower, presses down on knob, and back-moving spring shrinks, and round bar and gear move downward, gear with
Teeth groove separates, and gear no longer drives light barrier to move, in the fixed block insertion slot of lower disk surface, turn knob so that LED
Lamp plate moves straight up in the presence of guidance tape and guide rod, the increase of the distance between LED lamp panel and lampshade, LED
Intensity of light reduces, and reaches simple to operate, the convenient effect for adjusting intensity of light, avoids damaging the quality of LED, solves mesh
The LED of preceding in the market adjusts the brightness of LED by non-polar dimmer mostly, compromises the quality of LED, and regulation light is strong
Spend the problem of cumbersome.
（2）, the present invention by setting circular groove, ball and rolling bearing, when light barrier rotates, ball rotates in circular groove,
Sliding friction between light barrier and groove is converted into rolling friction by ball, and the contact area between ball and groove compared with
It is small, frictional resistance is greatly reduced, the sliding friction that rolling bearing is directed between band and guide rod is converted into rolling friction, made
With laborsaving, parts depreciation is reduced, extends the service life of LED.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is front elevational view at disk position of the present invention；
Fig. 3 is guidance tape opening position front view of the present invention；
Fig. 4 is light barrier top view of the present invention；
Fig. 5 is schematic enlarged-scale view at A in Fig. 1 of the present invention；
Fig. 6 is schematic enlarged-scale view at B in Fig. 1 of the present invention.
In figure：1 shell, 2 LED lamp panels, 3 lampshades, 4 round bars, 5 knobs, 6 back-moving springs, 7 pipes, 8 sliding bearings, 9 are led
To band, 10 fixing pipes, 11 disks, 12 gears, 13 fixed blocks, 14 slots, 15 grooves, 16 light barriers, 17 through holes, 18 teeth groove, 19
Perforation, 20 grooves, 21 guide plates, 22 guide rods, 23 circular grooves, 24 balls, 25 rolling bearings.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figures 1 to 6, the present invention provides a kind of technical scheme：A kind of new LED for being easy to adjust intensity of light, bag
Shell 1 and LED lamp panel 2 are included, the power supply mode of LED lamp panel 2 is external power source, and the inwall of shell 1 is fixedly connected with lampshade 3, lamp
Cover 3 is located at the underface of LED lamp panel 2, and round bar 4 is connected with the circular hole that the top of shell 1 opens up, and round bar 4 is used to drive circle
Disk 11 and gear 12 rotate, and the top of round bar 4 is fixedly connected with knob 5, and knob 5 is used to drive round bar 4 to rotate, the table of round bar 4
Face movable sleeve is connected to back-moving spring 6, presses down on knob 5, and back-moving spring 6 shrinks, and gear 12 separates with teeth groove 18, fixed block 13
Insert in slot 14, now turn knob 5, pipe 7 rotate, and light barrier 16 is motionless, unclamp knob 5, and back-moving spring 6 recovers initial
Length, round bar 4 drive disk 11 and gear 12 to move upwards, the both ends of back-moving spring 6 bottom with knob 5 and shell 1 respectively
Upper surface overlap joint, the surface activity of round bar 4 is socketed with pipe 7, and pipe 7 is used to drive guidance tape 9 to rotate, and pipe 7 is positioned at outer
The inside of shell 1, fixed cover is connected to sliding bearing 8 and guidance tape 9, the outer wall of sliding bearing 8 successively from top to bottom on the surface of pipe 7
It is fixedly connected with the surface of fixing pipe 10, fixing pipe 10 is flexibly connected pipe 7 by sliding bearing 8, and fixing pipe 10 is fixedly connected
At the top of the inwall of shell 1, fixed cover is connected to disk 11 and gear 12 successively from top to bottom on the surface of round bar 4, and disk 11 passes through
Fixed block 13 and slot 14 drive pipe 7 to rotate, and gear 12 drives light barrier 16 to rotate by teeth groove 18, disk 11 and gear 12
It is located at the bottom that the distance between the top and bottom of pipe 7, the lower surface and the top of pipe 7 of disk 11 are equal to knob 5 respectively
The distance between upper surface of shell 1, and the distance is equal to the thickness of gear 12, presses down on knob 5, gear 12 and teeth groove 18
Separation, fixed block 13 are inserted in slot 14, unclamp knob 5, and gear 12 engages with teeth groove 18, and fixed block 13 separates with slot 14,
The lower surface of disk 11 is fixedly connected with fixed block 13, and the top of pipe 7 offers slot 14, and fixed block 13 and slot 14 are in
It is cylindric, and 1 point 5 times of the diameter of a diameter of fixed block 13 of slot 14, the lower surface of fixed block 13 is spherical, fixed block 13
It is adapted with the shape and size of slot 14, facilitates fixed block 13 to insert in slot 14, the inwall of shell 1 opens up fluted
15, motion of the groove 15 to light barrier 16 has guide effect, and the inwall of groove 15 is connected with light barrier 16, light barrier 16
For circular acrylic plastics plate, there is certain translucency, the edge of light barrier 16 has circular groove 23, the inwall activity of circular groove 23
Ball 24 is connected with, the surface of ball 24 is overlapped with the inwall of groove 15, and ball 24 is reduced between light barrier 16 and groove 15
Frictional resistance, the upper surface of light barrier 16 offers through hole 17, and the inwall of through hole 17 offers teeth groove 18, and gear 12 passes through tooth
Groove 18 drives light barrier 16 to rotate, and the inwall of teeth groove 18 engages with gear 12, and the upper surface of light barrier 16 offers perforation 19, wears
The quantity in hole 19 is two groups, and the quantity of every group of perforation 19 is five, and the diameter of five perforation 19 is into Geometric Sequence, and ratio system
Number is 0.85, two groups of perforation 19 using the center of circle of through hole 17 be pivot in rotational symmetry, the quantity of LED lamp panel 2 is two, two
Group perforation 19 with two position correspondences of LED lamp panel 2, rotates light barrier 16 respectively, can adjust perforation 19 immediately below LED lamp panel 2
Size, perforation is 19 bigger, and light transmittance is higher, and perforation 19 is smaller, and light transmittance is lower, and the top of shell 1 offers groove 20, leads to
Motion of the groove 20 to guide plate 21 has guide effect, and the inwall of groove 20 is connected with guide plate 21, and guide plate 21 is to LED
The motion of lamp plate 2 has guide effect, and guide plate 21 is fixedly connected on the side of LED lamp panel 2, the corresponding guidance tape 9 of LED lamp panel 2
Opening position be fixedly connected with guide rod 22, guidance tape 9 drives LED lamp panel 2 to be moved in vertical direction by guide rod 22, is oriented to
The surface of bar 22 is fixedly connected with the inwall of rolling bearing 25, and the surface of rolling bearing 25 overlaps with the surface of guidance tape 9, is rolled
The sliding friction that bearing 25 is directed between bar 22 and guidance tape 9 is converted into rolling friction, reduces frictional resistance, reduces zero
Part wears, and guidance tape 9 is in left hand helix shape, and the quantity of guide rod 22 is two, and the position of two guide rods 22 and guidance tape 9 is equal
It is adapted.
When in use, turn knob 5, knob 5 are rotated by round bar 4 with moving gear 12, and gear 12 is driven by teeth groove 18
Light barrier 16 rotates so that the diameter of the perforation 19 of the face of LED lamp panel 2 is adjusted, presses down on knob 5, gear 12 and tooth
Groove 18 is separated, and fixed block 13 is inserted in slot 14, and now turn knob 5, knob 5 are driven by round bar 4, disk 11 and pipe 7
Guidance tape 9 rotates, and guidance tape 9 drives LED lamp panel 2 to move by guide rod 22, and LED lamp panel 2 is in guide plate 21 and groove 20
Moved under guide effect in vertical direction, adjust the distance between lower surface and lampshade 3 of LED lamp panel 2.
It can to sum up obtain, the present invention is by setting round bar 4, knob 5, back-moving spring 6, pipe 7, guidance tape 9, disk 11, solid
Determine block 13 and light barrier 16, the LED solved in the market adjusts the brightness of LED, damage by non-polar dimmer mostly
The quality of LED has been done harm to, has adjusted the problem of intensity of light is cumbersome.
It should be noted that herein, such as term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of new LED for being easy to adjust intensity of light, including shell（1）And LED lamp panel（2）, the shell（1）It is interior
Wall is fixedly connected with lampshade（3）, the lampshade（3）Positioned at LED lamp panel（2）Underface, it is characterised in that：The shell（1）
Round bar is connected with the circular hole that top opens up（4）, the round bar（4）Top be fixedly connected with knob（5）, the round bar
（4）Surface activity be socketed with back-moving spring（6）, the back-moving spring（6）Both ends respectively with knob（5）Bottom and shell
（1）Upper surface overlap joint, the round bar（4）Surface activity be socketed with pipe（7）, the pipe（7）Positioned at shell（1）It is interior
Portion, the pipe（7）Fixed cover is connected to sliding bearing successively from top to bottom on surface（8）And guidance tape（9）, the sliding bearing
（8）Outer wall and fixing pipe（10）Surface be fixedly connected, the fixing pipe（10）It is fixedly connected on shell（1）The top of inwall
Portion, the round bar（4）Fixed cover is connected to disk successively from top to bottom on surface（11）And gear（12）, the disk（11）And tooth
Wheel（12）It is located at pipe respectively（7）Top and bottom, the disk（11）Lower surface be fixedly connected with fixed block（13）, institute
State pipe（7）Top offer slot（14）, the shell（1）Inwall open up it is fluted（15）, the groove（15）'s
Inwall is connected with light barrier（16）, the light barrier（16）Upper surface offer through hole（17）, the through hole（17）'s
Inwall offers teeth groove（18）, the teeth groove（18）Inwall and gear（12）Engagement, the light barrier（16）Upper surface open
Provided with perforation（19）, the shell（1）Top offer groove（20）, the groove（20）Inwall be connected with guiding
Plate（21）, the guide plate（21）It is fixedly connected on LED lamp panel（2）Side, the LED lamp panel（2）Corresponding guidance tape（9）'s
Opening position is fixedly connected with guide rod（22）.
A kind of 2. new LED for being easy to adjust intensity of light according to claim 1, it is characterised in that：The disk
（11）Lower surface and pipe（7）The distance between top is equal to knob（5）Bottom and shell（1）Between upper surface away from
From, and the distance is equal to gear（12）Thickness.
A kind of 3. new LED for being easy to adjust intensity of light according to claim 1, it is characterised in that：It is described to be in the light
Plate（16）Edge have circular groove（23）, the circular groove（23）Inwall be connected with ball（24）, the ball（24）
Surface and groove（15）Inwall overlap joint.
A kind of 4. new LED for being easy to adjust intensity of light according to claim 1, it is characterised in that：The guiding
Band（9）In left hand helix shape, the guide rod（22）Quantity be two, two guide rods（22）With guidance tape（9）'s
Position is adapted.
A kind of 5. new LED for being easy to adjust intensity of light according to claim 1, it is characterised in that：The guiding
Bar（22）Surface and rolling bearing（25）Inwall be fixedly connected, the rolling bearing（25）Surface and guidance tape（9）'s
Surface overlaps.
A kind of 6. new LED for being easy to adjust intensity of light according to claim 1, it is characterised in that：The perforation
（19）Quantity be two groups, and every group of perforation（19）Quantity be five, five perforation（19）Diameter into Geometric Sequence,
And proportionality coefficient is 0.85.
A kind of 7. new LED for being easy to adjust intensity of light according to claim 1, it is characterised in that：Described in two groups
Perforation（19）With through hole（17）The center of circle for pivot in rotational symmetry, the LED lamp panel（2）Quantity be two, two groups
The perforation（19）Respectively with two LED lamp panels（2）Position correspondence.
A kind of 8. new LED for being easy to adjust intensity of light according to claim 1, it is characterised in that：The fixation
Block（13）And slot（14）It is cylindrical, and slot（14）A diameter of fixed block（13）1 point 5 times of diameter, it is described solid
Determine block（13）Lower surface it is spherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711048145.9A CN107816642A (en) | 2017-10-31 | 2017-10-31 | A kind of new LED for being easy to adjust intensity of light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711048145.9A CN107816642A (en) | 2017-10-31 | 2017-10-31 | A kind of new LED for being easy to adjust intensity of light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107816642A true CN107816642A (en) | 2018-03-20 |
Family
ID=61604029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711048145.9A Withdrawn CN107816642A (en) | 2017-10-31 | 2017-10-31 | A kind of new LED for being easy to adjust intensity of light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107816642A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844135A (en) * | 2018-07-23 | 2018-11-20 | 协建（江苏）智能装备有限公司 | A kind of air cleaning facility |
| CN113516929A (en) * | 2021-04-14 | 2021-10-19 | 深圳市美耐斯光电有限公司 | Side light-emitting system of thin lamp box |
| CN115152718A (en) * | 2022-07-05 | 2022-10-11 | 中国农业科学院烟草研究所(中国烟草总公司青州烟草研究所) | Disease and pest prevention and control device and method applied to flue-cured tobacco |
-
2017
- 2017-10-31 CN CN201711048145.9A patent/CN107816642A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844135A (en) * | 2018-07-23 | 2018-11-20 | 协建（江苏）智能装备有限公司 | A kind of air cleaning facility |
| CN113516929A (en) * | 2021-04-14 | 2021-10-19 | 深圳市美耐斯光电有限公司 | Side light-emitting system of thin lamp box |
| CN115152718A (en) * | 2022-07-05 | 2022-10-11 | 中国农业科学院烟草研究所(中国烟草总公司青州烟草研究所) | Disease and pest prevention and control device and method applied to flue-cured tobacco |
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| PB01 | Publication | ||
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Application publication date: 20180320 |