CN207991775U - Electronic product single-point waterproof test tool and test system - Google Patents
Electronic product single-point waterproof test tool and test system Download PDFInfo
- Publication number
- CN207991775U CN207991775U CN201820273602.8U CN201820273602U CN207991775U CN 207991775 U CN207991775 U CN 207991775U CN 201820273602 U CN201820273602 U CN 201820273602U CN 207991775 U CN207991775 U CN 207991775U
- Authority
- CN
- China
- Prior art keywords
- electronic product
- pipeline
- product single
- sealing
- waterproof test
- 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.)
- Active
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
A kind of the electronic product single-point waterproof test tool and test system of air tightness test technical field, including:Test station, the test station is for limiting part to be measured;At least one pressurization mechanism, the pressurization mechanism include:First axle displacement drive, transmission component and first axle displacement component, wherein first axle displacement component is connected with first axle displacement drive by transmission component, is moved after the first axis direction is gone forward;First axle displacement component end is equipped with sealing pressure head, seals and is equipped with fluid channel in pressure head, and fluid channel includes fluid inlet and fluid outlet, and sealing pressure head is pressed on part to be measured and is passed through the fluid progress waterproof test of setting pressure.The utility model can carry out waterproof test to regional area on electronic product, facilitate in research and development and manufacturing process and waterproof failure reason is investigated, leakage hidden danger is eliminated with Curve guide impeller or to waterproof vulnerable area reinforce the water resistance of processing raising partial structurtes.
Description
Technical field
The utility model relates to a kind of technology in air tightness test field, specifically a kind of electronic product single-point waterproofs
Test fixture and test system.
Background technology
The continuous improvement of living standard excites demand of the consumer for electronic product various functions, such as waterproof work(
Energy.There is the risk surprisingly intake in electronic product, if lacking water-proof function, it is possible to bring huge economic loss to consumer
And the inconvenience in daily life, therefore the waterproofing grade of electronic product is higher and higher in the market.
On the one hand, there may be the unexpected factors for destroying water resistance in research and development and manufacturing process, although on the other hand electricity
Sub- product can carry out complete machine water-proofing treatment, but in actual use, still remain the weak part of waterproof.These accidents
The weak part of factor and waterproof drastically influences the complete machine water resistance of electronic product, thus it is necessary in design, research and development
Waterproofing design is investigated in the process, finds leakage reason or weak part, to be improved.Current complete machine waterproof test
Scheme can only carry out overall mass detection and be difficult to meet above-mentioned requirements.
Utility model content
The utility model is directed to deficiencies of the prior art, it is proposed that a kind of electronic product single-point waterproof test work
Dress and test system can carry out waterproof test to regional area on electronic product, facilitate in research and development and manufacturing process to waterproof
Failure cause is investigated, and with Curve guide impeller, is eliminated leakage hidden danger or is carried out reinforcement processing to waterproof vulnerable area, improve part
The water resistance of structure.
The utility model is achieved through the following technical solutions:
The utility model is related to a kind of electronic product single-point waterproof test tools, including:
Test station, the test station is for limiting part to be measured;
At least one pressurization mechanism, the pressurization mechanism include:First axle displacement drive, transmission component
With first axle displacement component, wherein the first axle displacement component is connected with first axle displacement drive by transmission component,
It is moved after the first axis direction is gone forward;First axle displacement component end is equipped with sealing pressure head, is equipped in the sealing pressure head
Fluid channel, the fluid channel include fluid inlet and fluid outlet, and the sealing pressure head, which is pressed on part to be measured and is passed through, to be set
The fluid of constant-pressure carries out waterproof test;
The first axle is X-axis, Y-axis or Z axis.
The same electronic product single-point waterproof test tool is when being arranged multiple pressurization mechanisms, pressurization mechanism
One axis is axially not limited to same axial direction.
In X-axis and Y direction, the height of fluid inlet is less than fluid outlet in the first axle displacement drive
Highly.
The sealing pressure head is equipped with elastic sealing element with part contact site to be measured, prevents fluid leakage.
The sealing pressure head is equipped with pressure sensor, and the pressure that point to be measured on electronic product is pressed in sealing pressure head carries out
Monitoring.
Preferably, first axle displacement drive uses servo motor;
The first axle displacement component includes ball-screw, and ball-screw is arranged in parallel with servo motor motor shaft, described
Ball-screw is equipped with fixed block, and fixed block is equipped with fixed link, and fixed link is fixedly connected with sealing pressure head;
The transmission component is toothed belt transmission, including driving wheel, synchronous belt and driven wheel, wherein driving wheel is set to
On servo motor motor shaft, driven wheel is set on ball-screw, and driving wheel is connected with driven wheel by synchronous belt.
The pressurization mechanism is additionally provided with the second axial displacement drive component and/or third axial displacement drive component, convenient
Adjustment sealing pressure head is directed at the point to be measured on part to be measured, improves testing efficiency;Second axis, third axis are axial with first
Axis is axially vertical, and second axis is axial axially vertical with third axis.
Preferably, the second axial displacement drive component and third axial displacement drive component are all made of adjustment screw, described
Adjustment screw is threaded with pressurization mechanism, and the adjustment screw is equipped with adjusting knob, facilitates carry out manual fine-tuning;
The second axial displacement drive component and third axial displacement drive component can also be adopted according to customer requirement and product orientation feature
The adjustment of ram position is sealed with pneumatic element or electric element.
The utility model is related to the test systems based on above-mentioned apparatus, including:Electronic product single-point waterproof test tool is let out
Sink, vacuum pump and sealing container, wherein
The fluid outlet of electronic product single-point waterproof test tool is connected by pipeline with drain tank and is equipped on pipeline
First two-way hydraulic valve is set on the pipeline between electronic product single-point waterproof test tool fluid outlet and the first two-way hydraulic valve
There are gas control check valve, gas control check valve to be connected with leak detector,
Drain tank is equipped with level detection sensors device, and drain tank is connected by pipeline with vacuum pump and is equipped with first on pipeline
Vacuum solenoid, vacuum pump be connected by pipeline with sealing container and on pipeline be equipped with the second vacuum solenoid, drain tank with
Sealing container is connected by pipeline and the second two-way hydraulic valve is equipped on pipeline,
Water is housed in sealing container and is connected to positive pressure air source, sealing container and electronic product single-point waterproof test tool
Fluid inlet is connected by pipeline and third two-way hydraulic valve is equipped on pipeline,
Electronic product single-point waterproof test tool fluid inlet passes through the 4th two-way hydraulic valve and atmosphere.
The sealing container is equipped with the electric Proportion valve of control positive pressure source gas pressure and for pneumatic the three of filtering
Join part.
Preferably, it is also set between the fluid inlet and third two-way hydraulic valve of the electronic product single-point waterproof test tool
There are middle transition part, the 4th two-way hydraulic valve to be connected with middle transition part, the middle transition part is also associated with digital display pressure
Power table, it is convenient to be connected with the electronic product single-point waterproof test tool that different size configures, improve testing efficiency.
Technique effect
Compared with prior art, the utility model has the following advantages that:
1) waterproof test can be carried out to regional area on electronic product, facilitated in research and development and manufacturing process to waterproof failure
Reason is investigated, and with Curve guide impeller, is eliminated leakage hidden danger or is carried out reinforcement processing to waterproof vulnerable area, improve partial structurtes
Water resistance;
2) can multiple positions on same part to be measured be carried out at the same time with waterproof test, improve testing efficiency;
3) waterproof quality of electronic product after repair can be verified, avoided in maintenance process in after-sales service
The original waterproof measure of middle destruction customer equipment improves after-sale service quality;
4) test pressure not only can carry out waterproof test up to 0.6bar to common electronic products, can also be to being used for
The electronic product for continuing waterproof is needed to carry out waterproof test under the high-pressure states such as diving.
Description of the drawings
Fig. 1 is the overall structure diagram of test fixture in embodiment 1;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the test equipment overall structure diagram based on test fixture in embodiment 1;
Fig. 4 a are the first view of pressurization mechanism in embodiment 1;
Fig. 4 b are the second view of pressurization mechanism in embodiment 1;
Fig. 5 is the structural schematic diagram of transmission component and first axle displacement component in embodiment 1;
Fig. 6 a~Fig. 6 d are entire test process figure, are followed successively by water-filling, pressurize, pressure release and drain tank draining;
In figure:Electronic product single-point waterproof test tool 1, drain tank 2, vacuum pump 3, sealing container 4, the first bidirectional hydraulic
Valve 5, gas control check valve 6, leak detector 7, level detection sensors device 8, the first vacuum solenoid 9, the second vacuum solenoid 10, second
Two-way hydraulic valve 11, positive pressure air source 12, third two-way hydraulic valve 13, middle transition part 14, the 4th two-way hydraulic valve 15, digital display pressure
Power table 16, electric Proportion valve 17, pneumatic triple piece 18, vacuum pressure sensor 19, air 20, part to be measured 21, test station
101, pressurization mechanism 102, first axle displacement drive 103, transmission component 104, first axle displacement component 105, sealing
Pressure head 106, fluid inlet 107, fluid outlet 108, pressure sensor 109, elastic sealing element 110, motor cabinet 111, ball wire
Thick stick 112, fixed link 113, fixed block 114, supporting block 115, linear bearing 116, driving wheel 117, synchronous belt 118, driven wheel
119, the second axial displacement drive component 120, third axial displacement drive component 121.
Specific implementation mode
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
As shown in Figure 1, Figure 2, shown in Fig. 4 a and Fig. 5, the present embodiment is related to a kind of electronic product single-point waterproof test tool 1, packet
It includes:
Test station 101, the test station 101 is for limiting part 21 to be measured;
Pressurization mechanism 102, the pressurization mechanism 102 include:First axle displacement drive 103, transmission group
Part 104 and first axle displacement component 105, wherein the first axle displacement component 105 is logical with first axle displacement drive 103
It crosses transmission component 104 to be connected, be moved after the first axis direction is gone forward;105 end of first axle displacement component is equipped with sealing and presses
First 106, it is equipped with fluid channel in the sealing pressure head 106, the fluid channel includes fluid inlet 107 and fluid outlet 108,
The sealing pressure head 106 is pressed on part 21 to be measured and is passed through the fluid progress waterproof test of setting pressure.
As shown in figure 3, several electronic product single-point waterproof test tools 1 can be arranged in a test equipment.
The height of the first axle displacement component 105 being arranged in X-axis and Y direction, fluid inlet 107 is less than fluid outlet
108 height improves measuring accuracy convenient for the bubble in discharge fluid channel.
Preferably, there are three the settings of pressurization mechanism 102, the front and back shifting in X-axis, Y-axis and Z-direction respectively
It is dynamic.
The sealing pressure head 106 is equipped with elastic sealing element 110 with 21 contact site of part to be measured, prevents fluid leakage;It is described
Elastic sealing element 110 uses ring structure.
The sealing pressure head 106 is equipped with pressure sensor 109, and point to be measured on part 21 to be measured is pressed in sealing pressure head 106
Pressure be monitored.
Preferably, the first axle displacement drive 103 uses driving motor, is set on motor cabinet 111;Further
Preferably, using the higher servo motor of control accuracy.
As shown in Fig. 4 b and Fig. 5, the first axle displacement component 105 includes ball-screw 112 and fixed link 113, wherein
Ball-screw 112 is arranged in parallel with servo motor motor shaft, and the ball-screw 112 is equipped with fixed block 114, the electronics production
Product single-point waterproof test tool 1 is equipped with supporting block corresponding with fixed block 114 115;113 one end of fixed link is fixed on fixed block
On 114, the other end is slidably connected by linear bearing 116 and supporting block 115, sliding end and the sealing pressure head 106 of fixed link 113
It is fixedly connected.
The transmission component 104 is toothed belt transmission, including driving wheel 117, synchronous belt 118 and driven wheel 119, wherein
Driving wheel 117 is set on servo motor motor shaft, and driven wheel 119 is set on ball-screw 112, driving wheel 117 and driven
Wheel 119 is connected by synchronous belt 118.
The pressurization mechanism 102 is additionally provided with the second axial displacement drive component 120 and third axial displacement drive component
121, facilitate adjustment sealing pressure head 106 to be directed at the point to be measured on part 21 to be measured, improves testing efficiency;Second axis, third
Axis is axial axially vertical with first axle, and second axis is axial axially vertical with third axis.
Preferably, the second axial displacement drive component 120 and third axial displacement drive component 121 are all made of adjustment spiral shell
Silk, the adjustment screw is threaded with pressurization mechanism 102, the adjustment screw equipped with adjusting knob, facilitate into
Row manual fine-tuning;The second axial displacement drive component 120 and third axial displacement drive component 121 also can be used pneumatic element or
Electric element is sealed the adjustment of ram position.
As shown in Fig. 6 a~Fig. 6 d, the present embodiment is related to the test system based on above-mentioned apparatus, including:Electronic product single-point
Waterproof test tool 1, drain tank 2, vacuum pump 3 and sealing container 4, wherein
The fluid outlet 108 of electronic product single-point waterproof test tool 1 is connected with drain tank 2 by pipeline and on pipeline
Equipped with the first two-way hydraulic valve 5, the pipeline between fluid outlet 108 and the first two-way hydraulic valve 5 is equipped with gas control check valve 6,
Gas control check valve 6 is connected with leak detector 7,
Drain tank 2 is equipped with level detection sensors device 8, and drain tank 2 is connected by pipeline with vacuum pump 3 and is equipped on pipeline
First vacuum solenoid 9, vacuum pump 3 be connected by pipeline with sealing container 4 and on pipeline be equipped with the second vacuum solenoid 10,
Drain tank 2 be connected by pipeline with sealing container 4 and on pipeline be equipped with the second two-way hydraulic valve 11,
Water is housed in sealing container 4 and is connected to positive pressure air source 12, sealing container 4 and electronic product single-point waterproof test work
1 fluid inlet 107 is filled to be connected by pipeline and be equipped with third two-way hydraulic valve 13 on pipeline,
It is equipped between the fluid inlet 107 and third two-way hydraulic valve 13 of the electronic product single-point waterproof test tool 1
Middle transition part 14, the middle transition part 14 are connected with the 4th two-way hydraulic valve 15 and digital display manometer 16, the 4th two-way liquid
Pressure valve 15 is connected with air 20.
The sealing container 4 is equipped with the electric Proportion valve 17 of control positive pressure source gas pressure.
Preferably, the pipeline that the vacuum pump 3 is connected with drain tank 2 is equipped with vacuum pressure sensor 19, the vacuum
Pressure sensor 19 is used for signal piping leakproofness and vacuum degree.
Preferably, the test system is equipped with pneumatic triple piece 18, and positive pressure air source 12 will be compressed by pneumatic triple piece 18
Solid particle that may be present is separated in air, is purified air, is prevented from damaging test system and part to be measured.
When being tested using above system, sealing pressure head 106 applies tested point position the sealed pressure of 5 ± 0.1kg,
After detecting that pressure meets test request by pressure sensor 109, closes servo motor and carry out following test operation, and pass through
Digital display manometer 16 obtains the Fluid pressure information of point to be measured:
1) water-filling;Close the second vacuum solenoid 10, the second two-way hydraulic valve 11, the 4th two-way hydraulic valve 15 and gas control list
To valve 6, other valve bodies are opened, vacuum pump 3 is opened and vacuumizes, until vacuum degree reaches -80KPa;Setting passes through electrical ratio later
The Fluid pressure of valve 17 is 0.3Bar, and positive pressure air source 12 enters sealing container 4 by pneumatic triple piece 18, hydraulic pressure is entered pipeline;
After level detection sensors device 8 detects that flow passes through, the first two-way hydraulic valve 5 is closed;
2) pressurize;Electric Proportion valve 17 increases Fluid pressure to 0.6Bar, opens gas control check valve 6 and leak detector 7 later,
The first vacuum solenoid 9, vacuum pump 3 and third two-way hydraulic valve 13 are closed, keeps remaining valve body state constant;In water flow pressure
For, to test point pressurize 30 minutes, leak detector 7 acquires dwell pressure in real time in pressure maintaining period, works as pressurize under 0.6Bar states
Pressure is less than comparison collection value and illustrates to test point leakage, stops test, otherwise just passes through for test;
3) pressure release;The first vacuum solenoid 9 and the first two-way hydraulic valve 5 are opened, gas control check valve 6 and electrical ratio are closed
Valve 17 keeps remaining valve body state constant, opens vacuum pump 3 and vacuumizes;After vacuum pressure sensor 19 reaches setting value, open
4th two-way hydraulic valve 15 is connected to air 20, and water enters drain tank 2 in pipeline;
4) drain tank 2 drains;The first vacuum solenoid 9 is closed, the second vacuum solenoid 10 and the second bidirectional hydraulic are opened
Valve 11 keeps remaining valve body state constant, and vacuum pump 3 is vacuumized is discharged into sealing container 4 by the water in drain tank 2, by water route with
And product test point air-dries, after air-drying, electronic product can be continuing with.
It is emphasized that:The above is only the preferred embodiment of the present utility model, not appoints to the utility model
What formal limitation, any simple modification made by the above technical examples according to the technical essence of the present invention, etc.
With variation and modification, it is still within the scope of the technical solutions of the present invention.
Claims (10)
1. a kind of electronic product single-point waterproof test tool, which is characterized in that including:
Test station, the test station is for limiting part to be measured;
At least one pressurization mechanism, the pressurization mechanism include:First axle displacement drive, transmission component and
One axial displacement component, wherein the first axle displacement component is connected with first axle displacement drive by transmission component,
It is moved forward and backward in one axis direction;First axle displacement component end is equipped with sealing pressure head, and fluid is equipped in the sealing pressure head
Channel, the fluid channel include fluid inlet and fluid outlet, and the sealing pressure head is pressed on part to be measured and is passed through setting pressure
The fluid of power carries out waterproof test;
The first axle is X-axis, Y-axis or Z axis.
2. electronic product single-point waterproof test tool according to claim 1, characterized in that in X-axis and Y direction,
The height of fluid inlet is less than the height of fluid outlet in the first axle displacement drive.
3. electronic product single-point waterproof test tool according to claim 1, characterized in that the sealing pressure head with it is to be measured
Part contact site is equipped with elastic sealing element.
4. electronic product single-point waterproof test tool according to claim 3, characterized in that the sealing pressure head is equipped with pressure
Force snesor.
5. electronic product single-point waterproof test tool according to claim 1, characterized in that in pressurization mechanism,
The first axle displacement drive uses servo motor;
The first axle displacement component includes ball-screw, and ball-screw is arranged in parallel with servo motor motor shaft, the ball
Leading screw is equipped with fixed block, and fixed block is equipped with fixed link, and fixed link is fixedly connected with sealing pressure head;
The transmission component is toothed belt transmission, including driving wheel, synchronous belt and driven wheel, wherein driving wheel is set to servo
On motor axis, driven wheel is set on ball-screw, and driving wheel is connected with driven wheel by synchronous belt.
6. according to Claims 1 to 5 any one of them electronic product single-point waterproof test tool, characterized in that the pressurization
Sealing mechanism is additionally provided with the second axial displacement drive component and/or third axial displacement drive component, so as to adjust sealing pressure head alignment
Point to be measured on part to be measured;Second axis, third axis are axial axially vertical with first axle, and second axis is axial with the
Three axis are axially vertical.
7. electronic product single-point waterproof test tool according to claim 6, characterized in that the second axial displacement driving
Component and third axial displacement drive component are all made of adjustment screw, and the adjustment screw is joined with pressurization mechanism by screw thread
It connects, the adjustment screw is equipped with adjusting knob.
8. a kind of electronic product single-point water-proof investigating system, which is characterized in that including:Any one of claim 1~7 electronics
Product single-point waterproof test tool, drain tank, vacuum pump and sealing container, wherein
The fluid outlet of electronic product single-point waterproof test tool is connected by pipeline with drain tank and is equipped with first on pipeline
Two-way hydraulic valve, the pipeline between fluid outlet and the first two-way hydraulic valve are equipped with gas control check valve, gas control check valve and survey
Instrument is leaked to be connected,
Drain tank is equipped with level detection sensors device, and drain tank is connected by pipeline with vacuum pump and is equipped with the first vacuum on pipeline
Solenoid valve, vacuum pump are connected by pipeline with sealing container and are equipped with the second vacuum solenoid, drain tank and sealing on pipeline
Container is connected by pipeline and the second two-way hydraulic valve is equipped on pipeline,
Water is housed in sealing container and is connected to positive pressure air source, the fluid of sealing container and electronic product single-point waterproof test tool
Import is connected by pipeline and third two-way hydraulic valve is equipped on pipeline,
The fluid inlet of electronic product single-point waterproof test tool passes through the 4th two-way hydraulic valve and atmosphere.
9. test system according to claim 8, characterized in that the sealing container is equipped with control positive pressure source gas pressure
The electric Proportion valve of power.
10. test system according to claim 8, characterized in that the stream of the electronic product single-point waterproof test tool
Middle transition part, the 4th two-way hydraulic valve and middle transition part phase are additionally provided between body import and third two-way hydraulic valve
Even, the middle transition part is also associated with digital display manometer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820273602.8U CN207991775U (en) | 2018-02-27 | 2018-02-27 | Electronic product single-point waterproof test tool and test system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820273602.8U CN207991775U (en) | 2018-02-27 | 2018-02-27 | Electronic product single-point waterproof test tool and test system |
Publications (1)
Publication Number | Publication Date |
---|---|
CN207991775U true CN207991775U (en) | 2018-10-19 |
Family
ID=63824878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820273602.8U Active CN207991775U (en) | 2018-02-27 | 2018-02-27 | Electronic product single-point waterproof test tool and test system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN207991775U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108120572A (en) * | 2018-02-27 | 2018-06-05 | 博众精工科技股份有限公司 | Electronic product single-point waterproof test tool and test system |
-
2018
- 2018-02-27 CN CN201820273602.8U patent/CN207991775U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108120572A (en) * | 2018-02-27 | 2018-06-05 | 博众精工科技股份有限公司 | Electronic product single-point waterproof test tool and test system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN203203767U (en) | Leakage test system | |
CN201051039Y (en) | Container leakage detection system | |
CN106053243B (en) | The intelligent quick detection line of the rotating disc type liquefied petroleum gas steel cylinder water pressure test | |
CN102297750B (en) | Solenoid valve on-line checkingi platform | |
CN203479474U (en) | Vacuum tester | |
CN214066442U (en) | Waterproof testing arrangement is used in instrument and meter manufacturing | |
CN101718611B (en) | Engine part and whole airtightness detection device | |
CN209166762U (en) | A kind of air-tightness detection device | |
CN106066232A (en) | A kind of intravenous needle conduit ventilation detection device | |
CN100582711C (en) | Device for testing product air leakage | |
CN207991775U (en) | Electronic product single-point waterproof test tool and test system | |
CN205879474U (en) | Vertical compression leak detector | |
CN105758599A (en) | Automatic leakage detecting device of water heater or wall-hung stove and operating method thereof | |
CN103123309A (en) | Pressurization system used for detecting internal-pressure resistance of ceramic tube | |
CN102928183A (en) | High-low-pressure sealed one-step detecting method and detecting device of liquefied petroleum gas cylinder valve | |
CN101846568B (en) | Internal pressure tester of lighter | |
CN108120572A (en) | Electronic product single-point waterproof test tool and test system | |
CN103123311B (en) | Device used for detecting pressure resistance of ceramic tube | |
CN211347275U (en) | Automatic pressure detection device for cavity workpiece | |
CN205670068U (en) | A kind of water heater or the automatic leakage detection equipment of wall-hung boiler | |
CN203629777U (en) | Medicine bottle leak detection machine | |
CN208751962U (en) | Mobile gas cylinder internal test method water pressure test detection device | |
CN2233575Y (en) | Dry rapid leakage-measuring instrument for vehicle radiator | |
CN202083531U (en) | Pressure cover sealing testboard used for automobiles | |
CN209085871U (en) | A kind of compressor cylinder leak detector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |