CN108397634A - A kind of water inspection for automobile radiators leak detection is silently - Google Patents
A kind of water inspection for automobile radiators leak detection is silently Download PDFInfo
- Publication number
- CN108397634A CN108397634A CN201810379599.2A CN201810379599A CN108397634A CN 108397634 A CN108397634 A CN 108397634A CN 201810379599 A CN201810379599 A CN 201810379599A CN 108397634 A CN108397634 A CN 108397634A
- Authority
- CN
- China
- Prior art keywords
- silently
- spanner
- piston
- vent line
- leak detection
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000007689 inspection Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/11—Plugs
- F16L55/1141—Plugs the plug being made of elastic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of water inspections for automobile radiators leak detection silently, it is arranged at the nozzle of radiator inleting pipe (7), including silently bar (1), spanner (2), briquetting (3), cylindrical rubber fixed block (4), block (5) and nut (6), the silently bar (1) is axially inside equipped with a vent line (8), the spanner (2) connects the vent line (8), the cylindrical rubber fixed block (4) is arranged between briquetting (3) and block (5), and it is fixed by nut (6), the briquetting (3), cylindrical rubber fixed block (4), the seal assembly of block (5) and nut (6) composition is arranged at the nozzle of radiator inleting pipe (7).Compared with prior art, the present invention can make to need one silently silently to be substituted with one with the structure of an air inlet switch originally, simple in structure, at low cost.
Description
Technical field
The present invention relates to automobile radiators, silently more particularly, to a kind of water inspection for automobile radiators leak detection.
Background technology
Automobile radiators, charge air cooler are the important parts of automobile.Their major function is the medium in internal operation
(liquid or gas) takes away heat by the heat exchange with cooled external air reduces temperature.The medium of internal operation is once revealed
It will lead to the failure of heat exchange.
To cause automobile to be not normally functioning, even results in cylinder and kill and scrap.Therefore automobile radiators, charge air cooler exist
Stringent Air leak test is had to pass through when the manufacturing.
Air leak test is divided into dry type leak detection and wet type is hunted leak two kinds.Wherein wet type leak detection be by radiator into,
Be discharged it is effective silently seal, and by one of them intermediate axial duct silently to the pressure for applying certain pressure inside radiator
Contracting air.And be immersed in the water radiator, whether observation radiator has bubble caused by leakage to generate.Observe leakage position simultaneously
And it collects bubble and calculates slip.
Air leak test needs the nozzle by all openings of radiator quickly and effectively to seal, i.e., blocks up nozzle
Firmly, and when to the compressed air of application test pressure inside radiator it cannot silently pop up.Wherein at least one is silently
Straight-through pipeline there are one internal can be used for applying detection pressure to radiator internal ventilation.Simultaneously will also there are one control compression
The switch of air, can installation silently when close compressed air and supply gas, silently block after nozzle pressurization of supplying gas.
The present invention is that inlet/outlet pipe of the design one for heat exchanger leakages detections such as automobile radiators wind, charge air coolers is bored
Head, its main feature is that opening compressed air aspirated switch while silently blocking radiator inlet/outlet pipe.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind being used for car radiation
The water inspection of device leak detection is silently.
The purpose of the present invention can be achieved through the following technical solutions：A kind of water for automobile radiators leak detection
Inspection silently, is arranged at the nozzle of radiator inleting pipe, which is characterized in that including silently bar, spanner, briquetting, cylindrical rubber
Fixed block, block and nut, the silently bar are axially inside equipped with a vent line, and the spanner connects the ventilation
Pipeline, cylindrical rubber fixed block setting are fixed between briquetting and block, and by nut, the briquetting, circle
The seal assembly of cylindrical rubber fixed block, block and nut composition is arranged at the nozzle of radiator inleting pipe；
Spanner is pulled, briquetting extruded cylindrical rubber fixed block is made, until it is radially expanded, with radiator inlet inside pipe wall shape
At sealing, vent line is opened simultaneously, is supplied gas into radiator.
It is set on the vent line there are one perpendicular endoporus, spring and the work with extension bar is equipped in the endoporus
Plug, the spring are located at piston side, and the extension bar of piston is connect with spanner, and under conventional sense, piston blocks vent line
Make its closing, when detection being needed to leak, pulls spanner, piston is pulled to exit, open vent line.
The piston side is the spring for making it reset, and the other side, which is equipped with, makes a concession space, pulls spanner, pulls piston extremely
Space is made a concession, or pushes piston press spring, vent line is opened, is inflated into radiator, leakage situation is detected, has detected
Finish, pulls spanner, piston resets under the force of a spring, blocks vent line.
The diameter of thickness >=vent line of the piston.
The extension bar top of the piston connects spanner, and spanner and the contact site on piston extension bar top are locked in spanner
Tight position and thickness at released position are different, under the action of the spring, the top of piston extension bar always with the inside of spanner
Face paste is closed, and changes the position of piston by the variation of position at laminating points.
The spanner includes the moving block part being connect with piston extension bar and is connected thereto the handle portion for rotation
Point, the moving block part is in square, is located at one jiao of moving block part with piston extension bar junction.
The moving block part is 5-10mm with piston extension bar junction and moving block part a line distance h1,
The side distance h2 being vertically connected with another is 30~80mm；When the handle portion of spanner is horizontal, spanner is
There are the gaps 0~15mm in released position between moving block section bottom and briquetting, when the handle portion of spanner is in vertical position,
Spanner is locked position, and moving block section bottom squeezes briquetting, makes cylindrical rubber fixed block sealed heat-dissipating device water inlet pipe.
One end of the silently bar is threaded, and can be installed gas connector and be connect with air inlet pipe.
Compared with prior art, the present invention has the following advantages：
1. the present invention be it is a kind of it is novel silently, this silently when not blocking inlet and outlet pipes inside inlet channel be to close
, and silently internal gas circuit is opened while blocking radiator inlet and outlet pipes.Therefore, novel can silently be made using this
One is originally needed silently silently to be substituted with one with the structure of an air inlet switch, it can be complete using first novel bored action
At using other silently two actions.
2. the air-leakage test for being silently used for automobile radiators, charge air cooler of the Air leak test of the present invention.Through reality
Border uses, which silently realizes well while handle is gone to compression seal position, opens
Air inlet pressurization channel；Go to the function that inlet channel is closed when unclamping sealing station.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention silently；
Fig. 2 is the sectional view of the present invention silently；
Fig. 3 is the opening state structural schematic diagram of silently vent line part of the invention；
Fig. 4 is the closed state structural schematic diagram of silently vent line part of the invention；
Fig. 5 be the present invention silently with radiator connection structure schematic diagram.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figs. 1-2, a kind of water inspection for automobile radiators leak detection silently, is arranged in radiator inleting pipe 7
Nozzle at, including silently bar 1, spanner 2, briquetting 3, cylindrical rubber fixed block 4, block 5 and nut 6, silently bar 1
It is axially inside equipped with a vent line 8, the spanner 2 connects the vent line 8, the cylindrical rubber fixed block
4 settings are fixed between briquetting 3 and block 5, and by nut 6, the briquetting 3, cylindrical rubber fixed block 4,5 and of block
The seal assembly that nut 6 forms is arranged at the nozzle of radiator inleting pipe 7；One end of the silently bar 1 is threaded, can
Installation gas connector is connect with air inlet pipe, to have the function of the pressurization of heat exchanger inner inflatable simultaneously.
The air-tightness, can be bored by this silently while enclosed interior cavity (the core inner cavities of such as automobile radiators)
The intermediate vent line 8 of head realizes the purpose to heat exchanger pressurization detection to gas is injected inside core.
From it is traditional silently unlike, which, which silently also has, opens and closes internal vent line 8
Function (Fig. 2).When air-tightness is not sealed with heat exchanger silently, internal ventilation pipeline 8 is to close.When silently with
(spanner 2 rotates to the position that compression cylindrical rubber block 4 makes it be radially expanded), internal ventilation pipe when heat exchanger seals
Road 8 is to open.
Realize that the structure of this function is to control the silently bar 1 of air-tightness silently axially inside by a piston 10
Vent line 8 closing and unlatching.Wherein, it is set on the vent line 8 there are one perpendicular endoporus, in the endoporus
Piston 10 (as shown in Figure 3) equipped with spring 9 and with extension bar, the spring 9 are located at 10 side of piston, the stretching of piston 10
Bar is connect with spanner 2, and 10 side of piston is the spring 9 for making it reset, and the other side, which is equipped with, makes a concession space 11, the work
The diameter of thickness >=vent line 8 of plug 10, under conventional sense, piston 10, which blocks vent line 8, makes its closing, and detection is needed to let out
When leakage, spanner 2 is pulled, pulls piston 10 to yielding space 11, or it (is living in the present embodiment to push piston 10 to squeeze spring 9
Plug squeezes spring and opens vent line 8, as shown in Figure 3), vent line 8 is opened, is inflated into radiator, leakage situation is detected,
Detection finishes, and pulls spanner 2, and piston 10 resets under the active force of spring 9, blocks vent line 8 (as shown in Figure 4).
The spanner 2 includes the moving block part 21 being connect with piston extension bar and is connected thereto the handle for rotation
Part 22, the moving block part 21 are in square, are located at 21 1 jiaos of moving block part with piston extension bar junction.
The moving block part 21 is with piston extension bar junction 23 and 21 a line distance h1 of moving block part
5-10mm, the side distance h2 being vertically connected with another are 30~80mm；When the handle portion 22 of spanner 2 is horizontal
When, spanner 2 is released position, has the gaps 0~15mm between 21 bottom of moving block part and briquetting 3, when the handle portion 22 of spanner 2
When in vertical position, spanner 2 is locked position, and 21 bottom squeeze briquetting 3 of moving block part makes cylindrical rubber fixed block 4
Sealed heat-dissipating device water inlet pipe 7.
The extension bar top of the piston 10 connects spanner 2, and spanner 2 and the contact site on 2 extension bar top of piston exist
2 locked position of spanner and thickness at released position are different, under the action of spring 9, the top of piston extension bar always with pull
The medial surface of hand 2 is bonded, and changes the position of piston 10 by the variation of position at laminating points.
The effect of the handle of air-tightness silently makes it be radially expanded one is jacking up briquetting compression cylindrical rubber block
To the air-tightness silently effect with heat exchanger Inlet and outlet water (gas) seal of tube.The second is pushing piston rod movement, change piston position
Set to be turned on and off air-tightness silently in inlet channel.
Its function of sealing is so that it is rotated by 90 ° direction by pulling spanner 2, so that briquetting is axially pressed using cam principle
Contracting cylindrical rubber block, until it is sealed to being radially expanded to be formed with heat exchanger inlet and outlet pipes inner wall.
Wherein sealing function is realized by following steps：Spanner 2 is pulled, 3 extruded cylindrical rubber fixed block 4 of briquetting is made,
It is radially expanded to it, is formed and sealed with 7 inner wall of radiator inleting pipe, opened simultaneously vent line 8, supply gas into radiator.
The air-leakage test for being silently used for automobile radiators, charge air cooler of the Air leak test of the present invention.Such as Fig. 5 institutes
Show, when using it for radiator, by of the present invention silently 12 along airintake direction, is inserted into the radiator inleting pipe 7 of radiator 13
Nozzle.Through actual use, handle is being gone to compression seal position by silently realizing well for the Air leak test
While, the channel of the air inlet pressurization of opening；Go to the function that inlet channel is closed when unclamping sealing station.Meet design to want
It asks.
Claims (8)
1. a kind of water inspection for automobile radiators leak detection silently, is arranged at the nozzle of radiator inleting pipe (7), special
Sign is, including silently bar (1), spanner (2), briquetting (3), cylindrical rubber fixed block (4), block (5) and nut (6), institute
The silently bar (1) stated axially inside is equipped with a vent line (8), and the spanner (2) connects the vent line (8), institute
The cylindrical rubber fixed block (4) stated is arranged between briquetting (3) and block (5), and pressure fixed by nut (6), described
The seal assembly that block (3), cylindrical rubber fixed block (4), block (5) and nut (6) form is arranged in radiator inleting pipe (7)
Nozzle at；
Spanner (2) is pulled, briquetting (3) extruded cylindrical rubber fixed block (4) is made, until it is radially expanded, with radiator inleting pipe
(7) inner wall forms sealing, opens simultaneously vent line (8), supplies gas into radiator.
2. a kind of water inspection for automobile radiators leak detection according to claim 1 is silently, which is characterized in that described
Vent line (8) on set there are one perpendicular endoporus, spring (9) and the piston with extension bar are equipped in the endoporus
(10), the spring (9) is located at piston (10) side, and the extension bar of piston (10) is connect with spanner (2), under conventional sense,
Piston (10), which blocks vent line (8), makes its closing, when detection being needed to leak, pulls spanner (2), piston (10) is pulled to exit,
Open vent line (8).
3. a kind of water inspection for automobile radiators leak detection according to claim 2 is silently, which is characterized in that described
Piston (10) side be the spring (9) for making it reset, the other side, which is equipped with, makes a concession space (11), pulls spanner (2), pulls piston
(10) to yielding space (11), or piston (10) is pushed to squeeze spring (9), opens vent line (8), is filled into radiator
Gas detects leakage situation, and detection finishes, and pulls spanner (2), piston (10) resets under the active force of spring (9), blocks ventilation
Pipeline (8).
4. a kind of water inspection for automobile radiators leak detection according to claim 2 is silently, which is characterized in that described
Piston (10) thickness >=vent line (8) diameter.
5. a kind of water inspection for automobile radiators leak detection according to claim 2 is silently, which is characterized in that described
Piston (10) extension bar top connection spanner (2), the contact site on spanner (2) and piston (2) extension bar top is in spanner
(2) locked position and thickness at released position are different, under the action of spring (9), the top of piston extension bar always with pull
The medial surface of hand (2) is bonded, and changes the position of piston (10) by the variation of position at laminating points.
6. a kind of water inspection for automobile radiators leak detection according to claim 2 is silently, which is characterized in that described
Spanner (2) include the moving block part (21) being connect with piston extension bar and be connected thereto the handle portion for rotation
(22), the moving block part (21) is in square, is located at (21) one jiaos of moving block part with piston extension bar junction.
7. a kind of water inspection for automobile radiators leak detection according to claim 6 is silently, which is characterized in that described
Moving block part (21) and piston extension bar junction (23) and moving block part (21) a line distance h1 be 5-10mm,
The side distance h2 being vertically connected with another is 30~80mm；When the handle portion (22) of spanner (2) is horizontal,
Spanner (2) is released position, has the gaps 0~15mm between moving block part (21) bottom and briquetting (3), when the handle of spanner (2)
When partly (22) are in vertical position, spanner (2) is locked position, and moving block part (21) bottom squeeze briquetting (3) makes cylinder
Shape rubber fixed block (4) sealed heat-dissipating device water inlet pipe (7).
8. a kind of water inspection for automobile radiators leak detection according to claim 1 is silently, which is characterized in that described
One end of silently bar (1) be threaded, gas connector can be installed and connect with air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379599.2A CN108397634B (en) | 2018-04-25 | 2018-04-25 | Water detection choke plug for automobile radiator leakage detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379599.2A CN108397634B (en) | 2018-04-25 | 2018-04-25 | Water detection choke plug for automobile radiator leakage detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108397634A true CN108397634A (en) | 2018-08-14 |
| CN108397634B CN108397634B (en) | 2024-04-19 |
Family
ID=63099340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810379599.2A Active CN108397634B (en) | 2018-04-25 | 2018-04-25 | Water detection choke plug for automobile radiator leakage detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108397634B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637040A (en) * | 2020-06-12 | 2020-09-08 | 法拉达汽车散热器（天津）有限公司 | Quick inflation connector for water detection leakage of special water chamber of pipe-belt type automobile radiator |
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| CN2135778Y (en) * | 1992-10-06 | 1993-06-09 | 国营第四八二厂 | Air-tightness tester for electric accumulator |
| CN2347140Y (en) * | 1998-09-22 | 1999-11-03 | 交通部重庆公路科学研究所 | Device of detecting auto's cylinder pressure and gas leakage volumn |
| CN102481982A (en) * | 2009-07-10 | 2012-05-30 | 空中客车运营简化股份公司 | Device for closing fuel-dump circuit of an aircraft |
| CN102680189A (en) * | 2012-05-10 | 2012-09-19 | 黄山科能汽车散热器有限公司 | Leakage detecting device |
| CN103486286A (en) * | 2013-09-23 | 2014-01-01 | 苏州华恒医用器械有限公司 | Wrench switch |
| EP2738439A1 (en) * | 2012-11-29 | 2014-06-04 | IK-UK Limited | Anchor apparatus |
| CN203657973U (en) * | 2013-11-27 | 2014-06-18 | 上海德朗汽车零部件制造有限公司 | Safe leakage detection device to prevent accident pop-up |
| CN106066229A (en) * | 2016-06-06 | 2016-11-02 | 江苏武进不锈股份有限公司 | Simple type steel pipe air seal test outlet closing device |
| CN208281698U (en) * | 2018-04-25 | 2018-12-25 | 上海德朗汽车零部件制造有限公司 | Water inspection for automobile radiators leak detection is silently |
-
2018
- 2018-04-25 CN CN201810379599.2A patent/CN108397634B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135778Y (en) * | 1992-10-06 | 1993-06-09 | 国营第四八二厂 | Air-tightness tester for electric accumulator |
| CN2347140Y (en) * | 1998-09-22 | 1999-11-03 | 交通部重庆公路科学研究所 | Device of detecting auto's cylinder pressure and gas leakage volumn |
| CN102481982A (en) * | 2009-07-10 | 2012-05-30 | 空中客车运营简化股份公司 | Device for closing fuel-dump circuit of an aircraft |
| CN102680189A (en) * | 2012-05-10 | 2012-09-19 | 黄山科能汽车散热器有限公司 | Leakage detecting device |
| EP2738439A1 (en) * | 2012-11-29 | 2014-06-04 | IK-UK Limited | Anchor apparatus |
| CN103486286A (en) * | 2013-09-23 | 2014-01-01 | 苏州华恒医用器械有限公司 | Wrench switch |
| CN203657973U (en) * | 2013-11-27 | 2014-06-18 | 上海德朗汽车零部件制造有限公司 | Safe leakage detection device to prevent accident pop-up |
| CN106066229A (en) * | 2016-06-06 | 2016-11-02 | 江苏武进不锈股份有限公司 | Simple type steel pipe air seal test outlet closing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637040A (en) * | 2020-06-12 | 2020-09-08 | 法拉达汽车散热器（天津）有限公司 | Quick inflation connector for water detection leakage of special water chamber of pipe-belt type automobile radiator |
| CN111637040B (en) * | 2020-06-12 | 2024-02-27 | 法拉达汽车散热器（天津）有限公司 | Pipe belt type automobile radiator special water chamber water detection leakage quick inflation connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108397634B (en) | 2024-04-19 |
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| Date | Code | Title | Description |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240326 Address after: 201503 No.7, Lane 381, Hong'an Road, Zhujing Town, Jinshan District, Shanghai Applicant after: SHANGHAI DELANG AUTO RADIATOR MANUFACTURING Co.,Ltd. Country or region after: China Address before: No. 58, Yanghebang Road, Songjiang Hi tech Park, Songjiang District, Shanghai, 201615 Applicant before: SHANGHAI DELANG AUTO PARTS MANUFACTURING Co.,Ltd. Country or region before: China |
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