CN103900774B - Oil cooler is dry, sealing test method and equipment thereof are closed in wet mixing - Google Patents
Oil cooler is dry, sealing test method and equipment thereof are closed in wet mixing Download PDFInfo
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- CN103900774B CN103900774B CN201410135485.5A CN201410135485A CN103900774B CN 103900774 B CN103900774 B CN 103900774B CN 201410135485 A CN201410135485 A CN 201410135485A CN 103900774 B CN103900774 B CN 103900774B
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Abstract
The invention belongs to oil cooler leakage test technical field, refer in particular to that a kind of oil cooler is dry, sealing test method and equipment thereof are closed in wet mixing, include dry test system and water test system, the gas that dry test system passes into respectively different pressures by the water route in oil cooler and oil circuit leaks hunting; Whether water test system is that oil cooler is inserted in water, and the water route or the oil circuit that originally passed into low-pressure gas are passed into gases at high pressure, detect and have bubble to carry out side leakage; Dry test method for testing leak tightness test process of the present invention set artificial and machine advantage separately, have cost of equipment low, directly perceived, dry the features such as easy, be particularly suitable for also in small lot batch manufacture stage or the unsettled product of qualification rate.
Description
Technical field
The invention belongs to oil cooler leakage test technical field, refer in particular to that a kind of oil cooler is dry, sealing is closed in wet mixingTest method and equipment thereof.
Background technology
Oil cooler sealing is the key characteristic of product, performing leak test be oil cooler produce critical process itOne. Disk, box-type oil cooler exist the oil circuit of mutual isolation and water route need to test respectively sealing simultaneously,The performing leak test pressure of oil cooler is high, general water route test pressure 0.5～2MPa, and oil circuit test pressure 1～2MPa, and have three kinds of leakage mode: water route leaks outside, oil circuit leaks outside, interior leakage between oil circuit and water route,Require test respectively. Traditional oil cooler sealing test method is water examination method, exist people be visualization notReliably after (when interior leakage, minute bubbles be can't see), test, need to dry the problems such as power consumption is large. More existing dry examinationMethod exist cost of equipment high, can not judge the problems such as leakage point, when the product needed that detects leakage againMake water examination method find leakage point, while not being very high, can bring a lot of troubles in product percent of pass.
Summary of the invention
The object of this invention is to provide and a kind of detect that effect accuracy is high, cost of equipment is low, dry and be easy to oilCooler is dry, sealing test method and equipment thereof are closed in wet mixing.
The object of the present invention is achieved like this:
Oil cooler is dry, seal tightness test equipment is closed in wet mixing, includes dry test system and water test system, describedDry test system is: include the first high-pressure air source pipeline with the first magnetic valve of docking with the oil circuit of oil cooler,The low-pressure gas source pipeline with the second magnetic valve docking with the water route of oil cooler, the first described high pressure gas source capsuleOn road, be provided with pressure sensor, on the first described high-pressure air source pipeline, be connected with for discharging oil coolerGases at high pressure on oil circuit with the high-pressure air source gas exhaust piping of the 3rd magnetic valve, at the second magnetic valve and oilOn low-pressure gas source pipeline between the water route of cooler, be provided with leak detector, on leak detector, be connected with contrast chamber, instituteOn the low-pressure gas source pipeline of stating, be connected with the gas that discharges on oil cooler water route the exhaust with the 4th magnetic valvePipeline, described water test system is: include the tank for oil cooler being placed in to water, at oil coolerOn low-pressure gas source pipeline between water route and leak detector, be provided with the 5th magnetic valve, at the 5th magnetic valve and oil coolingOn low-pressure gas source pipeline between the water route of device, be connected with high pressure air is provided in the water route to oil coolerWith the second high-pressure air source pipeline of the 6th magnetic valve, on the second high-pressure air source pipeline, be provided with pressure sensor.
The low-pressure gas source pipeline, the first high pressure gas source capsule that between the water route of above-mentioned oil cooler and oil circuit, dockRoad interchangeable.
The above-mentioned high-pressure air source gas exhaust piping with the 3rd magnetic valve be arranged on the first magnetic valve and oil cooler itBetween on the first high-pressure air source pipeline; Or the described high-pressure air source gas exhaust piping with the 3rd magnetic valve is by threeLogical adapter docks with oil cooler, and threeway adapter also connects the first high-pressure air source pipeline.
The above-mentioned gas exhaust piping with the 4th magnetic valve is arranged on the low pressure between the 5th magnetic valve and leak detectorOn source of the gas pipeline; Or the described gas exhaust piping with the 4th magnetic valve is arranged on oil cooler and the 5th magnetic valveBetween low-pressure gas source pipeline on.
The method that oil cooler is dry, seal tightness test is closed in wet mixing, concrete steps are as follows:
1) test is prepared: before test, by oil cooler water route and the connection of low-pressure gas source pipeline sealing, oil circuitConnect and seal with the first high-pressure air source pipeline, due to complete hermetic reason, when the whole immersion of oil coolerAfter in water, water route and oil circuit inside can not intake;
2) adopt dry test system to carry out the interior test leakage examination between oil circuit and water route: open first, second, the 5thMagnetic valve is filled with high pressure air in the first high-pressure air source pipeline, in low-pressure gas source pipeline, is filled with low pressureCompressed air; Water route or oil circuit are connected with leak detector, after inflation, and the first magnetic valve and the second magnetic valveClose, leak detector detects the variation of water route pressure, owing to having pressure differential between oil circuit and water route, so work asWhile leakage in existing between oil circuit, water route, will make water route pressure change, the permission that exceedes setting changesValue, leak detector will alarm product leakage, and test finishes; Arrived the detection time of setting, if oilyBetween road, water route, there is no interior leakage, enter next step water examination process;
3) adopt water test system to test: if do not discharge water in tank in step 1), in tank, to pileWater, closes the 5th magnetic valve between water route and leak detector, opens the 6th electricity on the second high-pressure air source pipelineWhether magnet valve, connects high pressure air, and oil circuit pressure is constant, and oil cooler is immersed in the water, observe with eyesHave bubble to emerge, leaker is mark leak position directly, stops test;
4) pressure release: open the 3rd magnetic valve, the 4th magnetic valve on high-pressure air source gas exhaust piping and gas exhaust piping,Pressure release is carried out respectively in oil circuit to oil cooler and water route;
5) dry: the oil cooler after pressure release in step 4) is taken out from water, use drying plant dry orPerson dries up appearance moisture with compressed air.
In the dry examination process of step 1), oil cooler can be immersed in the water or not be immersed in the water and carry out.
The pressure of the high pressure air in the first above-mentioned high-pressure air source pipeline is 1～2MPa, and low pressure compression is emptyThe pressure of gas is 10～5000Pa, the pressure of the high pressure air in the second high-pressure air source pipeline is 0.5～2MPa。
The low-pressure gas source pipeline, the first high pressure gas source capsule that between the water route of above-mentioned oil cooler and oil circuit, dockRoad interchangeable.
The advantage that the present invention gives prominence to is compared to existing technology:
1, the present invention adopts dry, wet (water) mixing sealing test method, draws dry method for testing and water simultaneouslyThe advantage of method for testing, avoids again its shortcoming; The test of oil cooler inner sealing adopts dry method for testing, does not contactWater; Adopt water examination and the oil circuit of oil cooler leaks outside and water route leaks outside, can see intuitively leak position, surveyTried rear easy oven dry, even directly dry up with compressed air and do not need dry.
2, dry test method for testing leak tightness test process of the present invention set artificial and machine advantage separately,Have cost of equipment low, directly perceived, dry the features such as easy, be particularly suitable for also in the small lot batch manufacture stageOr the unsettled product of qualification rate.
Brief description of the drawings
Fig. 1 is principle schematic of the present invention.
In figure, 1-tank, 2-oil circuit, 3-water route, 4-the 5th magnetic valve, 5-gas exhaust piping, 6-the 4th electricityMagnet valve, 7-the second magnetic valve, 8-low-pressure gas source pipeline, 9-the first high-pressure air source pipeline, 10-pressure sensor,11-the first magnetic valve, 12-high-pressure air source gas exhaust piping, 13-the 3rd magnetic valve, 14-the second high pressure gas source capsuleRoad, 15-pressure sensor, 16-the 6th magnetic valve, 17-contrasts chamber, 18-leak detector (built-in pressure difference sensingDevice and related system).
Detailed description of the invention
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, referring to Fig. 1:
Oil cooler is dry, seal tightness test equipment is closed in wet mixing, includes dry test system and water test system, describedDry test system is: include first high-pressure air source with the first magnetic valve 11 of docking with the oil circuit 2 of oil coolerPipeline 9, with the water route 3 of oil cooler and low-pressure gas source pipeline 8 with the second magnetic valve 7, the first described heightOn pressurized air source pipeline 9, be provided with pressure sensor 10, on the first described high-pressure air source pipeline 9, be connected with useIn discharging gases at high pressure on the oil circuit 2 of oil cooler the high-pressure air source blast pipe with the 3rd magnetic valve 13Road 12 is provided with leak detection on the low-pressure gas source pipeline 8 between the second magnetic valve 7 and the water route 3 of oil coolerInstrument 18, is connected with contrast chamber 17 on leak detector 18, be connected with and discharge oil on described low-pressure gas source pipeline 8Gas on cooler water route 3 with the gas exhaust piping 5 of the 4th electromagnetism 6 valves, described water test system is: bagDraw together the tank 1 for oil cooler being placed in to water, low between the water route 3 of oil cooler and leak detector 18On pressurized air source pipeline 8, be provided with the 5th magnetic valve 4, between the 5th magnetic valve 4 and the water route 3 of oil coolerOn low-pressure gas source pipeline 8, be connected with the 6th electromagnetism of being with that high pressure air is provided in the water route 3 to oil coolerThe second high-pressure air source pipeline 14 of valve 16 is provided with pressure sensor 15 on the second high-pressure air source pipeline 14.
The low-pressure gas source pipeline 8, the first high pressure that between the water route 3 of above-mentioned oil cooler and oil circuit 2, dockSource of the gas pipeline 9 interchangeable. The water route 3 that is to say oil cooler can connect the first high-pressure air source pipeline 9, oil circuit 2Connect low-pressure gas source pipeline 8, when corresponding water examination, test with regard to be filled with high pressure air in oil circuit 2.
The above-mentioned high-pressure air source gas exhaust piping 12 with the 3rd magnetic valve 13 be arranged on the first magnetic valve 11 withBetween oil cooler on the first high-pressure air source pipeline 9; Or the described high-pressure air source with the 3rd magnetic valve 13 rowAir pipe 12 docks with oil cooler by threeway adapter, and threeway adapter also connects the first high-pressure air source pipeline9。
The above-mentioned gas exhaust piping 5 with the 4th magnetic valve 6 be arranged on the 5th magnetic valve 4 and leak detector 18 itBetween low-pressure gas source pipeline 8 on; Or the described gas exhaust piping 5 with the 4th magnetic valve 6 is arranged on oil coolingOn low-pressure gas source pipeline 8 between device and the 5th magnetic valve 4.
The present invention is applicable to disc type, box-type oil cooler to test.
The method that oil cooler is dry, seal tightness test is closed in wet mixing, concrete steps are as follows:
1) test is prepared: before test, by oil cooler water route 3 with low-pressure gas source pipeline 8 by frock and folderTool connection sealing, oil circuit and the first high-pressure air source pipeline 9 are connected and are sealed by frock and fixture, due toComplete hermetic reason, when oil cooler is whole be immersed in the water after, water route 3 and oil circuit 2 inside can not intake;
2) adopt dry test system to carry out the interior test leakage examination between oil circuit 2 and water route 3: Pen-down detection button, beatOpen first, second, the 5th magnetic valve 11,7,4, in the first high-pressure air source pipeline 9, be filled with 1～2MPaHigh pressure air (presetting force value according to product needed), pressure sensor 10 is monitored high pressure compressedPressure when air input, is filled with 10～5000Pa low-pressure compressed air in low-pressure gas source pipeline 8, contrast chamberIn 17, be also filled with the low-pressure compressed air with low-pressure gas source pipeline 8 uniform pressure; Water route 3 connects with leak detector 18Connect, after inflation, the first magnetic valve 11 and the second magnetic valve 7 are closed, and leak detector 18 detects water route 3The variation of pressure, owing to having 1～2MPa pressure differential between oil circuit 2 and water route 3, so when oil circuit 2, waterWhile leakage in existing between road 3, will make water route 3 pressure change, exceed the permission changing value of setting,Leak detector 18 will alarm product leakage, and test finishes; Arrived the detection time of setting, if oil circuit2, between water route 3, there is no interior leakage, enter next step water examination process;
3) adopt water test system to test: if do not discharge water in tank 1 in step 1), in tank 1Pile clean water, close the 5th magnetic valve 4 between water route 3 and leak detector 18, open the second high pressure gasThe 6th magnetic valve 16 on source capsule road 14, connects and is filled with 0.5～2MPa high pressure air (according to product needPreset force value), pressure when pressure sensor 15 is monitored high pressure air input, oil circuit 2Whether pressure is constant, and oil cooler is immersed in the water, observe and have bubble to emerge with eyes, and leaker can directly be markedNote leak position, stops test; Pressure of the present invention is relative pressure, i.e. gauge pressure;
4) pressure release: open the 3rd magnetic valve 13, on high-pressure air source gas exhaust piping 12 and gas exhaust piping 5Four magnetic valves 6, pressure release is carried out respectively in the oil circuit 2 to oil cooler and water route 3;
5) dry: to unclamp frock clamp, the oil cooler after pressure release in step 4) is taken out from water, stampMark of conformity, uses drying plant to dry or dries up appearance moisture with compressed air.
After oil cooler performing leak test completes, because baroque inside does not have water, only have outer surface to have fewWater gaging divides, and is very easy to use compressed air to dry up or drying plant oven dry.
In the dry examination process of step 1), oil cooler can be immersed in the water or not be immersed in the water and carry out.
The low-pressure gas source pipeline 8, the first high pressure that between the water route 3 of above-mentioned oil cooler and oil circuit 2, dockSource of the gas pipeline 9 interchangeable.
High pressure air and low-pressure air that the present invention uses are dried gas.
Above-described embodiment is only preferred embodiment of the present invention, not limits according to this protection of the present inventionScope, therefore: all equivalences of doing according to structure of the present invention, shape, principle change, and all should containWithin protection scope of the present invention.
Claims (8)
1. seal tightness test equipment is closed in dry, the wet mixing of oil cooler, it is characterized in that: include dry test system andWater test system, described dry test system is: include dock with the oil circuit of oil cooler with the first magnetic valveThe first high-pressure air source pipeline, the low-pressure gas source pipeline with the second magnetic valve docking with the water route of oil cooler, instituteOn the first high-pressure air source pipeline of stating, be provided with pressure sensor, on the first described high-pressure air source pipeline, connectBe useful on the gases at high pressure that discharge on the oil circuit of oil cooler the high-pressure air source blast pipe with the 3rd magnetic valveRoad is provided with leak detector on the low-pressure gas source pipeline between the second magnetic valve and the water route of oil cooler, leak detectionOn instrument, be connected with contrast chamber, on described low-pressure gas source pipeline, be connected with the gas that discharges on oil cooler water route alsoWith the gas exhaust piping of the 4th magnetic valve, described water test system is: include for oil cooler is placed in to waterIn tank, on the low-pressure gas source pipeline between water route and the leak detector of oil cooler, be provided with the 5th magnetic valve,On low-pressure gas source pipeline between the 5th magnetic valve and the water route of oil cooler, be connected with in the water route to oil coolerProvide the second high-pressure air source pipeline with the 6th magnetic valve of high pressure air, at the second high-pressure air source pipelineOn be provided with pressure sensor.
2. seal tightness test equipment is closed in dry, the wet mixing of oil cooler according to claim 1, and its feature existsIn: the low-pressure gas source pipeline, the first high pressure gas source capsule that between the water route of described oil cooler and oil circuit, dockRoad interchangeable.
3. seal tightness test equipment is closed in dry, the wet mixing of oil cooler according to claim 1, and its feature existsIn: the described high-pressure air source gas exhaust piping with the 3rd magnetic valve be arranged on the first magnetic valve and oil cooler itBetween on the first high-pressure air source pipeline; Or the described high-pressure air source gas exhaust piping with the 3rd magnetic valve is by threeLogical adapter docks with oil cooler, and threeway adapter also connects the first high-pressure air source pipeline.
4. seal tightness test equipment is closed in dry, the wet mixing of oil cooler according to claim 1, and its feature existsIn: the described gas exhaust piping with the 4th magnetic valve is arranged on the low pressure between the 5th magnetic valve and leak detectorOn source of the gas pipeline; Or the described gas exhaust piping with the 4th magnetic valve is arranged on oil cooler and the 5th magnetic valveBetween low-pressure gas source pipeline on.
5. utilize the test method that oil cooler is dry, seal tightness test equipment is closed in wet mixing described in claim 1,It is characterized in that: concrete steps are as follows:
1) test is prepared: before test, by oil cooler water route and the connection of low-pressure gas source pipeline sealing, oil circuitConnect and seal with the first high-pressure air source pipeline, due to complete hermetic reason, when the whole immersion of oil coolerAfter in water, water route and oil circuit inside can not intake;
2) adopt dry test system to carry out the interior test leakage examination between oil circuit and water route: open first, second, the 5thMagnetic valve is filled with high pressure air in the first high-pressure air source pipeline, in low-pressure gas source pipeline, is filled with low pressureCompressed air; Water route or oil circuit are connected with leak detector, after inflation, and the first magnetic valve and the second magnetic valveClose, leak detector detects the variation of water route pressure, owing to having pressure differential between oil circuit and water route, so work asWhile leakage in existing between oil circuit, water route, will make water route pressure change, the permission that exceedes setting changesValue, leak detector will alarm product leakage, and test finishes; Arrived the detection time of setting, if oilyBetween road, water route, there is no interior leakage, enter next step water examination process;
3) adopt water test system to test: if step 1) in do not discharge water in tank, in tank, pileWater, closes the 5th magnetic valve between water route and leak detector, opens the 6th electricity on the second high-pressure air source pipelineWhether magnet valve, connects high pressure air, and oil circuit pressure is constant, and oil cooler is immersed in the water, observe with eyesHave bubble to emerge, leaker is mark leak position directly, stops test;
4) pressure release: open the 3rd magnetic valve, the 4th magnetic valve on high-pressure air source gas exhaust piping and gas exhaust piping,Pressure release is carried out respectively in oil circuit to oil cooler and water route;
5) dry: by step 4) in oil cooler after pressure release from water, take out, use drying plant dry orPerson dries up appearance moisture with compressed air.
6. according to claim 5ly utilize the test that oil cooler is dry, seal tightness test equipment is closed in wet mixingMethod, is characterized in that: in step 1) in dry examination process, oil cooler can be immersed in the water or not immerse waterIn carry out.
7. according to claim 5ly utilize the test that oil cooler is dry, seal tightness test equipment is closed in wet mixingMethod, is characterized in that: the pressure of the high pressure air in the first described high-pressure air source pipeline is 1～2MPa, the pressure of low-pressure compressed air is 10～5000Pa, the high pressure compressed sky in the second high-pressure air source pipelineThe pressure of gas is 0.5～2MPa.
8. according to claim 5ly utilize the test that oil cooler is dry, seal tightness test equipment is closed in wet mixingMethod, is characterized in that: the low-pressure gas source pipeline that docks between the water route of described oil cooler and oil circuit,The first high-pressure air source pipeline interchangeable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410135485.5A CN103900774B (en) | 2014-04-04 | 2014-04-04 | Oil cooler is dry, sealing test method and equipment thereof are closed in wet mixing |
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| CN201410135485.5A CN103900774B (en) | 2014-04-04 | 2014-04-04 | Oil cooler is dry, sealing test method and equipment thereof are closed in wet mixing |
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| CN103900774B true CN103900774B (en) | 2016-05-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043674B (en) * | 2015-09-09 | 2018-12-14 | 浙江施克汽车配件有限公司 | A kind of liquid storage dryer air-tightness detection method |
| CN107576458A (en) * | 2017-09-26 | 2018-01-12 | 安徽安凯汽车股份有限公司 | A kind of brake line of automobile air-tightness automatic detection device and its detection method |
| CN109540400A (en) * | 2018-11-29 | 2019-03-29 | 东莞市卓越鑫汽车电子科技有限公司 | The waterproof detection method of coaxial connector and the waterproof detection system of coaxial connector |
| CN110307951A (en) * | 2019-07-25 | 2019-10-08 | 浙江银轮机械股份有限公司 | Dry type leakage detecting apparatus and dry type leak hunting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813432A1 (en) * | 1998-03-27 | 1999-09-30 | Michael Stetter | Gas leak detection apparatus for testing of components, such as automobile radiators and oil-coolers |
| CN201935788U (en) * | 2010-12-29 | 2011-08-17 | 浙江林邦控股集团有限公司 | Gas tightness detecting device for oil cooler tube |
| CN103308254A (en) * | 2013-05-06 | 2013-09-18 | 浙江银轮机械股份有限公司 | Dry test method and dry test device for testing leak tightness of oil cooler |
| CN203287167U (en) * | 2013-05-16 | 2013-11-13 | 浙江银轮机械股份有限公司 | Dry test equipment for sealing performance of oil cooler |
| CN203798518U (en) * | 2014-04-04 | 2014-08-27 | 浙江银轮机械股份有限公司 | Drying-wet mixing sealing testing equipment of oil cooler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007205836A (en) * | 2006-02-01 | 2007-08-16 | Calsonic Kansei Corp | Airtightness testing method of heat exchanger having oil cooler built in radiator tank |
-
2014
- 2014-04-04 CN CN201410135485.5A patent/CN103900774B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813432A1 (en) * | 1998-03-27 | 1999-09-30 | Michael Stetter | Gas leak detection apparatus for testing of components, such as automobile radiators and oil-coolers |
| CN201935788U (en) * | 2010-12-29 | 2011-08-17 | 浙江林邦控股集团有限公司 | Gas tightness detecting device for oil cooler tube |
| CN103308254A (en) * | 2013-05-06 | 2013-09-18 | 浙江银轮机械股份有限公司 | Dry test method and dry test device for testing leak tightness of oil cooler |
| CN203287167U (en) * | 2013-05-16 | 2013-11-13 | 浙江银轮机械股份有限公司 | Dry test equipment for sealing performance of oil cooler |
| CN203798518U (en) * | 2014-04-04 | 2014-08-27 | 浙江银轮机械股份有限公司 | Drying-wet mixing sealing testing equipment of oil cooler |
Non-Patent Citations (1)
| Title |
|---|
| 发动机油冷器密封性能检测装置的设计;周建洪 等;《内燃机与配件》;20050228(第1期);第41页 * |
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Denomination of invention: Test method and equipment of dry and wet mixture tightness of oil cooler Effective date of registration: 20210610 Granted publication date: 20160518 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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Effective date of registration: 20220815 Address after: No. 111 Qingwei Road, Fengxian District, Shanghai 201400 Patentee after: SHANGHAI YINLUN HEAT EXCHANGE SYSTEM CO.,LTD. Address before: 317200 Fuxi Street Transportation Machinery Industrial Park, Tiantai County, Taizhou, Zhejiang Patentee before: ZHEJIANG YINLUN MACHINERY Co.,Ltd. |
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