CN107991055A - Gobi Integrated environment wind tunnel simulation device - Google Patents
Gobi Integrated environment wind tunnel simulation device Download PDFInfo
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- CN107991055A CN107991055A CN201711158979.5A CN201711158979A CN107991055A CN 107991055 A CN107991055 A CN 107991055A CN 201711158979 A CN201711158979 A CN 201711158979A CN 107991055 A CN107991055 A CN 107991055A
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- gobi
- snowflake
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
Abstract
The invention discloses a kind of gobi integrated environment wind tunnel simulation device, apply in environmental wind tunnel simulator field, including power section, snowflake section and the test section being sequentially arranged, wind-force section is interior to be equipped with wind turbine；Snowflake generating means is equipped with snowflake section；Test section inlet is equipped with grit generating means, and test section lower wall is equipped with the turntable of carrying experimental model, and test section upper wall position is equipped with drench with rain device and some solar radiation lamps.Wind tunnel experiment device currently for environment is mostly for hydromechanical research in aircraft or aeronautical field, is not had almost for the simulator of gobi integrated environment wind-tunnel.And gobi has the landform of certain area coverage as China territory, the analog study of its integrated environment has critically important actual directive significance for traveling in gobi of automobile and unmanned plane, flight, and the present invention has the function of that dust storm, wind and snow, wind and rain, high solar radiation environment occurs in simulation gobi.
Description
Technical field
The invention belongs to environmental wind tunnel simulator field, and in particular to a kind of gobi integrated environment wind tunnel simulation device.
Background technology
Gobi refers mainly to ground and is almost covered by rough sand, gravel, the desert belt of plant rareness.The gobi of China is extensive
Wen Douer mausoleums-lark mausoleum-one line of Etuoke Banner-salt pond is distributed in the vast desert of northwest, half-desert level land, the gross area
About 45.5 ten thousand sq-kms.The earth's surface in gobi is that loess also has slightly bigger sandstone mixing composition, when blowing
The ambient conditions for being dust mostly, flying sands and howling wind also occurring when wind-force is big blown afloat.In addition to wind sand environment, gobi also has height
Solar radiation, and rainfall, the ambient conditions of snowfall.
Wind tunnel experiment device currently for environment is mostly to be directed to hydromechanical research in aircraft or aeronautical field, for
The simulator of gobi integrated environment wind-tunnel does not have almost.And gobi is with having the landform of certain area coverage as China territory
Looks, the analog study of its integrated environment have critically important actual finger for traveling in gobi of automobile and unmanned plane, flight
Lead meaning.
Therefore, it is necessary to work out a kind of gobi integrated environment wind tunnel simulation device, there is simulation gobi dust storm, wind occur
Snow, wind and rain, the function of high solar radiation environment.
The content of the invention
In view of this, it is an object of the invention to provide a kind of gobi integrated environment wind tunnel simulation device, there is simulation dagger-axe
There is dust storm, wind and snow, wind and rain, the function of high solar radiation environment in wall.
To reach above-mentioned purpose, the present invention provides following technical solution：
A kind of gobi integrated environment wind tunnel simulation device, including power section, snowflake section and the test section being sequentially arranged, it is described
Wind turbine is equipped with wind-force section；Snowflake generating means is equipped with the snowflake section；The test section inlet is filled equipped with grit
Put, test section lower wall is equipped with the turntable of carrying experimental model, and test section upper wall is located at the turntable area just above and is equipped with
Drench with rain device, remaining region of upper wall is equipped with some solar radiation lamps.
Preferably, the snowflake generating means includes some liquid nitrogen sprays and sprinkler head being circumferentially provided in snowflake section,
The liquid nitrogen spray is connected by liquid nitrogen pipeline with liquid nitrogen source, and the sprinkler head is connected by water lines with pressure water source；It is described
Liquid nitrogen pipeline with being equipped with the first air pipe and the second air pipe communicated therewith, first air pipe respectively on the outside of water lines
It is connected with the second air pipe with pressure gas source.
Preferably, the water lines outer surface is equipped with muff.
Preferably, the grit generating means includes grit tank and air compressor；The air compressor passes through outlet air
Pipe is to the exit air blast of grit tank, and the grit carried after air blast is through sending sand tube to be discharged into test section inlet.
Preferably, the test section inlet is equipped with temperature air volume test device；The wind turbine is equipped with wind control valve；Institute
State liquid nitrogen source, pressure water source, pressure gas source exit are respectively equipped with liquid nitrogen control valve, water source control valve and air source control valve；Institute
State grit tank and air compressor exit is respectively equipped with lower husky adjustable valve and wind speed regulating valve.
Preferably, the device of drenching with rain includes the tube sheet connected with pressure water source and connects and set thereunder with tube sheet
Some rain nozzles；It is connected in the middle part of the tube sheet by universal spherical joint supporter with test section upper wall, four side of tube sheet is stretched by electronic
Contracting bar is connected with test section upper wall.
Preferably, the diffuser and stable section being sequentially arranged between power section and snowflake section are further included；The diffuser
Internal diameter is gradually extended to identical with stable section internal diameter along inlet air direction；The stable section internal diameter is identical with snowflake section internal diameter.
Preferably, honeycomb or filter drift net are equipped with the stable section.
Preferably, the mixing contraction section being arranged between snowflake section and test section is further included；The mixing contraction section internal diameter
It is gradually reduced along inlet air direction to identical with test section internal diameter.
Preferably, deflector is equipped between the test section entrance and turntable, the blade of the deflector is in elongated water chestnut
Shape.
The beneficial effects of the present invention are：
1st, the present invention can be achieved to simulate and test dust storm, wind and snow, wind and rain, high solar radiation integrated environment to automobile or nothing
Man-machine influence.
2nd, the present invention can simulate the big environmental quality of gobi landform day and night temperature, i.e. the high temperature on daytime passes through solar radiation
Light irradiation is realized；The low temperature in evening produces cold air and realizes by only spraying liquid nitrogen, wind turbine air blast.
3rd, the liquid nitrogen spray and sprinkler head that the present invention uses are circumferentially disposed, and the filling composite rate of snowflake is produced in wind-tunnel
Higher, the ability for manufacturing high-volume snowflake are more preferable.
4th, diffuser, stable section and the mixing contraction section that the present invention uses can be such that air-flow and wind speed more stablizes.
5th, the temperature air volume test device and multiple control valves that the present invention uses, realize the regulation and control to wind and snow flow and temperature,
Temperature is realized by adjusting water source temperature, while can also realize the adjusting to sand speed and sand amount, and experimenter can basis
Use demand, more flexibly sets and adjusts the condition value of wind-tunnel input environment.
Brief description of the drawings
In order to make the purpose of the present invention, technical solution and beneficial effect clearer, the present invention provides drawings described below and carries out
Explanation：
Fig. 1 is overall structure sectional view of the present invention；
Fig. 2 is a-quadrant close-up schematic view in Fig. 1；
Fig. 3 is B area close-up schematic view in Fig. 1；
Fig. 4 is C regions close-up schematic view in Fig. 1.
Marked in attached drawing as follows：Power section 1, wind turbine 11, wind control valve 111, snowflake section 2, liquid nitrogen spray 21, sprinkler head
22nd, liquid nitrogen pipeline 23, liquid nitrogen source 24, liquid nitrogen control valve 241, water lines 25, muff 251, pressure water source 26, water source control valve
261st, the first air pipe 27, the second air pipe 28, pressure gas source 29, air source control valve 291, test section 3, turntable 31, the sun
Can radial burner 32, grit tank 33, lower husky adjustable valve 331, air compressor 34, wind speed regulating valve 341, discharge pipe 35, send sand
Pipe 36, temperature air volume test device 37, tube sheet 38, universal spherical joint supporter 381, electric telescopic rod 382, rain nozzle 39, diffuser 4,
Stable section 5, honeycomb or filter drift net 51, mixing contraction section 6, deflector 7, experimental model 10.
Embodiment
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
A kind of gobi integrated environment wind tunnel simulation device, including power section 1, snowflake section 2 and the test section 3 being sequentially arranged,
Wind turbine 11 is equipped with the wind-force section 1；Snowflake generating means is equipped with the snowflake section 2；3 inlet of test section is equipped with sand
Gravel generating means, 3 lower wall of test section are equipped with the turntable 31 of carrying experimental model 10, and 3 upper wall of test section is located at the turntable
31 area just aboves are equipped with device of drenching with rain, remaining region of upper wall is equipped with some solar radiation lamps 32.The service condition of the present invention
It is as follows.
Wind and snow pattern：Experimental model 10 is positioned on turntable 31, if experimental model is automotive-type, can also rotated
31 layer overlay grit layer of platform, with real simulation gobi ground environment.Then the wind turbine 11 in power section 1 is opened, in wind-tunnel
Form stable air-flow.Snowflake generating means in snowflake section 2 produces snowflake, and the air-flow produced through wind turbine, which is swept along, to float into test section
3, act on experimental model in the form of wind and snow environment.
Dust storm：Experimental model 10 is positioned on turntable 31, the wind turbine 11 in power section 1 is opened, is formed in wind-tunnel
Stable air-flow, the grit generating means for opening 3 inlet of test section produce grit, and the air-flow produced through wind turbine, which is swept along, to float into survey
Section 3 is tried, experimental model is acted in the form of wind sand environment.
Wind and rain：Experimental model 10 is positioned on turntable 31, the wind turbine 11 in power section 1 is opened, is formed in wind-tunnel
Stable air-flow blows to test section, opens the device generation rainfall of drenching with rain that 3 upper wall of test section is located at 31 area just above of turntable,
Experimental model is acted in the form of wind and rain environment.
High solar radiates：Experimental model 10 is positioned on turntable 31, opens some solar energy of 3 upper wall of test section
Radial burner 32 carries out simulated sunlight irradiation to experimental model, and experimental model, mould are acted in the form of high solar radiation environment
Intend high radiation and hot environment.
Above pattern, experimental model 10 in the case where the rotation of turntable 31 drives, can 360 degrees omnidirection receive the survey of each environment
Examination, makes analog result more comprehensively true.Certainly, those skilled in the art can also close the spinfunction of turntable 31, only
Performance of the test experiments model single side under each environment.
Further, the snowflake generating means that the present embodiment uses includes some liquid nitrogen being circumferentially provided in snowflake section 2
Nozzle 21 and sprinkler head 22, the liquid nitrogen spray 21 are connected by liquid nitrogen pipeline 23 with liquid nitrogen source 24, and the sprinkler head 22 passes through
Water lines 25 are connected with pressure water source 26；The liquid nitrogen pipeline 23 is equipped with first communicated therewith respectively with the outside of water lines 25
27 and second air pipe 28 of air pipe, 27 and second air pipe 28 of the first air pipe are connected with pressure gas source 29.
Snowflake generating means working condition is as follows：Liquid nitrogen and water are delivered to liquid nitrogen through liquid nitrogen pipeline 23 and water lines 25 respectively
At nozzle 21 and sprinkler head 22, and the propulsion of the gases at high pressure come respectively in the first air pipe 27 and the conveying of the second air pipe 28 is made
Under, sprayed to 2 central area of snowflake section, because liquid nitrogen spray 21 and sprinkler head 22 are circumferentially disposed, snowflake is produced in wind-tunnel
Filling composite rate higher, manufacture high-volume snowflake ability it is more preferable.Liquid nitrogen rapid vaporization absorbs heat, and temperature is fast in snowflake segment occurred
Prompt drop is low, and then condensation cured is snowflake to water, and test section 3 is moved forward under the drive of air-flow.
Based on the device, the high temperature of gobi landform day and night temperature big environmental quality, i.e. daytime can be also simulated, such as 45 is Celsius
More than degree, realized by solar radiation light irradiation；The low temperature in evening, such as 0~5 degree Celsius, by only spraying liquid nitrogen, wind turbine drum
Wind produces cold air and realizes.
Further, 25 outer surface of water lines that the present embodiment uses is equipped with muff 251.Since sprinkler head 22 is cooled
The influence of air-flow is in extremely low temperature environment, and water body in sprinkler head may be caused to condense, block nozzle.To prevent this phenomenon from sending out
It is raw, muff is equipped with water lines outer surface, the water body in water lines is kept the temperature, is unlikely to the water temperature that nozzle sprays
It is too low, so as to ensure that sprinkler head is unimpeded.
Further, the grit generating means that the present embodiment uses includes grit tank 33 and air compressor 34；The sky
Air compressor 34 is by discharge pipe 35 to the 33 exit air blast of grit tank, and the grit carried after air blast is through sending sand tube 36 to be discharged into test
3 inlet of section, the situation of flying sands and howling wind when being blown with this real simulation gobi.
Further, 3 inlet of test section that the present embodiment uses is equipped with temperature air volume test device 37；On the wind turbine 11
Equipped with wind control valve 111；The liquid nitrogen source 24, pressure water source 26,29 exit of pressure gas source are respectively equipped with liquid nitrogen control valve
241st, water source control valve 261 and air source control valve 291；34 exit of grit tank 33 and air compressor is respectively equipped with lower sand
Adjustable valve 331 and wind speed regulating valve 341.
The measurement data of temperature air volume test device 37 can be obtained by exterior control processor, and manually or automatically regulate and control wind
Force control valve 111, liquid nitrogen control valve 241, water source control valve 261, air source control valve 291, lower husky adjustable valve 331 and wind speed tune
Valve 341 is saved, realizes the regulation and control to wind and snow flow and temperature, temperature is realized by adjusting water source temperature, while can also be realized to raising
The adjusting of husky speed and sand amount.Experimenter more can flexibly set according to use demand and adjust wind-tunnel input environment
Condition value.
Further, the device of drenching with rain of the present embodiment use includes the tube sheet 38 connected with pressure water source 26 and connects with tube sheet
Lead to and some rain nozzles 39 thereunder are set；The middle part of tube sheet 38 passes through universal spherical joint supporter 381 and 3 upper wall of test section
Connection, 38 4 side of tube sheet are connected by electric telescopic rod 382 with 3 upper wall of test section, because view reason show only two in Fig. 4
Two electric telescopic rods on a side.Tube sheet 38 can be under the cooperation impetus of the electric telescopic rod 382 on four sides, and in multi-directional ball
Hinged-support 381 fixs the solid point at center, does a certain range of face and rotates, makees so as to fulfill the rainfall sprayed to rain nozzle 39
For the adjusting of 10 angle of experimental model, make rainfall process more true.
Further, integrated environment wind tunnel simulation device in gobi described in the present embodiment, which further includes, is sequentially arranged in power section 1
Diffuser 4 and stable section 5 between snowflake section 2；4 internal diameter of diffuser is gradually extended to and stable section 5 along inlet air direction
Internal diameter is identical；5 internal diameter of stable section is identical with 2 internal diameter of snowflake section.Diffuser 4 can make wind turbine adopt into high speed and high pressure air-flow obtain
To be suitably depressured, stable section 5 can ensure that the air-flow for entering snowflake section 2 is more steady straight.
Further, honeycomb or filter drift net 51 are equipped with the stable section 5 that the present embodiment uses, to improve air-flow product
Matter.
Further, integrated environment wind tunnel simulation device in gobi described in the present embodiment, which further includes, is arranged on snowflake section 2 and surveys
Try the mixing contraction section 6 between section 3；It is described mixing 6 internal diameter of contraction section along inlet air direction be gradually reduced to 3 internal diameter phase of test section
Together.Mixing contraction section 6 can make liquid nitrogen acted on water to be formed snowflake process it is more stable, while also make the mixing of snowflake and air-flow more
Add the wind and snow for uniformly, being delivered to test section also can suitably pressurize under the mixing contraction section effect that internal diameter reduces, make wind and snow more
Powerful concentration.
Further, deflector 7, the water conservancy diversion are equipped between the present embodiment uses 3 entrance of test section and turntable 31
The blade of plate is in elongated diamond shaped.Deflector can make experimenter select wind and snow to act on the direction of experimental model, and be arranged to
Elongated diamond shaped, windage smaller, water conservancy diversion effect are more preferable.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (10)
1. a kind of gobi integrated environment wind tunnel simulation device, including power section, snowflake section and the test section being sequentially arranged, its feature
It is：Wind turbine is equipped with the wind-force section；Snowflake generating means is equipped with the snowflake section；The test section inlet is equipped with sand
Gravel generating means, test section lower wall are equipped with the turntable of carrying experimental model, and test section upper wall is located at directly over the turntable
Region is equipped with device of drenching with rain, remaining region of upper wall is equipped with some solar radiation lamps.
2. integrated environment wind tunnel simulation device in gobi according to claim 1, it is characterised in that：The snowflake generating means
Including some liquid nitrogen sprays and sprinkler head being circumferentially provided in snowflake section, the liquid nitrogen spray passes through liquid nitrogen pipeline and liquid nitrogen source
Connection, the sprinkler head are connected by water lines with pressure water source；Be equipped with respectively on the outside of the liquid nitrogen pipeline and water lines with
Its first air pipe and the second air pipe for connecting, first air pipe and the second air pipe are connected with pressure gas source.
3. integrated environment wind tunnel simulation device in gobi according to claim 2, it is characterised in that：The water lines outer surface
It is equipped with muff.
4. integrated environment wind tunnel simulation device in gobi according to claim 2, it is characterised in that：The grit generating means
Including grit tank and air compressor；The air compressor, to the exit air blast of grit tank, is carried by discharge pipe after air blast
Grit through sending sand tube to be discharged into test section inlet.
5. integrated environment wind tunnel simulation device in gobi according to claim 4, it is characterised in that：The test section inlet
Equipped with temperature air volume test device；The wind turbine is equipped with wind control valve；The liquid nitrogen source, pressure water source, pressure gas source outlet
Place is respectively equipped with liquid nitrogen control valve, water source control valve and air source control valve；The grit tank and air compressor exit difference
Equipped with lower husky adjustable valve and wind speed regulating valve.
6. integrated environment wind tunnel simulation device in gobi according to claim 2, it is characterised in that：The device of drenching with rain includes
The tube sheet that is connected with pressure water source and connected with tube sheet and some rain nozzles thereunder are set；Pass through ten thousand in the middle part of the tube sheet
It is connected to ball hinged support with test section upper wall, four side of tube sheet is connected by electric telescopic rod with test section upper wall.
7. integrated environment wind tunnel simulation device in gobi according to claim 1, it is characterised in that：Further include and be sequentially arranged
Diffuser and stable section between power section and snowflake section；The diffuser internal diameter is gradually extended to along inlet air direction and stable section
Internal diameter is identical；The stable section internal diameter is identical with snowflake section internal diameter.
8. integrated environment wind tunnel simulation device in gobi according to claim 7, it is characterised in that：It is equipped with the stable section
Honeycomb or filter drift net.
9. integrated environment wind tunnel simulation device in gobi according to claim 1, it is characterised in that：Further include and be arranged on snowflake
Mixing contraction section between section and test section；It is described mixing contraction section internal diameter along inlet air direction be gradually reduced to test section internal diameter
It is identical.
10. integrated environment wind tunnel simulation device in gobi according to claim 1, it is characterised in that：The test section entrance
Deflector is equipped between turntable, the blade of the deflector is in elongated diamond shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711158979.5A CN107991055A (en) | 2017-11-20 | 2017-11-20 | Gobi Integrated environment wind tunnel simulation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711158979.5A CN107991055A (en) | 2017-11-20 | 2017-11-20 | Gobi Integrated environment wind tunnel simulation device |
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| CN107991055A true CN107991055A (en) | 2018-05-04 |
Family
ID=62031706
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| CN201711158979.5A Pending CN107991055A (en) | 2017-11-20 | 2017-11-20 | Gobi Integrated environment wind tunnel simulation device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036915A (en) * | 2017-11-08 | 2018-05-15 | 同济大学 | A kind of wind tunnel experiment device of snowfall simulation suitable for high fluidity particle |
| CN108844706A (en) * | 2018-08-21 | 2018-11-20 | 北京化工大学 | A kind of array multi-function windtunnel drive system |
| CN109141803A (en) * | 2018-08-29 | 2019-01-04 | 杨雪锋 | A kind of transfer flight simulation wind-tunnel |
| CN109186926A (en) * | 2018-11-19 | 2019-01-11 | 温州大学瓯江学院 | A kind of wind-tunnel for simulating sandstorm |
| CN109398749A (en) * | 2018-10-16 | 2019-03-01 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | A kind of unmanned plane wind resistance rain test device |
| CN111076890A (en) * | 2019-12-17 | 2020-04-28 | 合肥工业大学 | Building wind and rain effect simulation test device |
| CN113405979A (en) * | 2021-06-22 | 2021-09-17 | 哈尔滨工业大学 | Adjustable heat source test device for solar radiation and accumulated snow coupling experiment |
| CN113533185A (en) * | 2021-07-19 | 2021-10-22 | 山东中程试验检测有限公司 | Building decoration material weather resistance detection equipment |
| CN114160214A (en) * | 2021-11-10 | 2022-03-11 | 中国空气动力研究与发展中心空天技术研究所 | Unmanned aerial vehicle extreme environment simulation laboratory |
| CN114166459A (en) * | 2022-02-11 | 2022-03-11 | 中国空气动力研究与发展中心计算空气动力研究所 | Wind tunnel group medium-voltage scheduling method |
| CN115096535A (en) * | 2022-07-08 | 2022-09-23 | 四川大学 | Water drop dynamics effect measuring method and system |
| CN117470451A (en) * | 2023-12-28 | 2024-01-30 | 常州市佳乐车辆配件制造有限公司 | AGS leakage testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036915A (en) * | 2017-11-08 | 2018-05-15 | 同济大学 | A kind of wind tunnel experiment device of snowfall simulation suitable for high fluidity particle |
| CN108844706A (en) * | 2018-08-21 | 2018-11-20 | 北京化工大学 | A kind of array multi-function windtunnel drive system |
| CN109141803A (en) * | 2018-08-29 | 2019-01-04 | 杨雪锋 | A kind of transfer flight simulation wind-tunnel |
| CN109141803B (en) * | 2018-08-29 | 2020-07-31 | 江苏普旭软件信息技术有限公司 | Move and carry flight simulation wind-tunnel |
| CN109398749A (en) * | 2018-10-16 | 2019-03-01 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | A kind of unmanned plane wind resistance rain test device |
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| CN111076890A (en) * | 2019-12-17 | 2020-04-28 | 合肥工业大学 | Building wind and rain effect simulation test device |
| CN113405979A (en) * | 2021-06-22 | 2021-09-17 | 哈尔滨工业大学 | Adjustable heat source test device for solar radiation and accumulated snow coupling experiment |
| CN113533185A (en) * | 2021-07-19 | 2021-10-22 | 山东中程试验检测有限公司 | Building decoration material weather resistance detection equipment |
| CN114160214A (en) * | 2021-11-10 | 2022-03-11 | 中国空气动力研究与发展中心空天技术研究所 | Unmanned aerial vehicle extreme environment simulation laboratory |
| CN114160214B (en) * | 2021-11-10 | 2023-10-27 | 中国空气动力研究与发展中心空天技术研究所 | Unmanned aerial vehicle extreme environment simulation laboratory |
| CN114166459A (en) * | 2022-02-11 | 2022-03-11 | 中国空气动力研究与发展中心计算空气动力研究所 | Wind tunnel group medium-voltage scheduling method |
| CN115096535A (en) * | 2022-07-08 | 2022-09-23 | 四川大学 | Water drop dynamics effect measuring method and system |
| CN115096535B (en) * | 2022-07-08 | 2023-10-24 | 四川大学 | Water drop dynamic effect measurement method and system |
| CN117470451A (en) * | 2023-12-28 | 2024-01-30 | 常州市佳乐车辆配件制造有限公司 | AGS leakage testing device |
| CN117470451B (en) * | 2023-12-28 | 2024-03-19 | 常州市佳乐车辆配件制造有限公司 | AGS leakage testing device |
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Application publication date: 20180504 |