CN116359601A - High-pressure PTC water heater test bench and heater test method thereof - Google Patents
High-pressure PTC water heater test bench and heater test method thereof Download PDFInfo
- Publication number
- CN116359601A CN116359601A CN202310406943.3A CN202310406943A CN116359601A CN 116359601 A CN116359601 A CN 116359601A CN 202310406943 A CN202310406943 A CN 202310406943A CN 116359601 A CN116359601 A CN 116359601A
- Authority
- CN
- China
- Prior art keywords
- test bench
- plate
- ptc heater
- heater
- positioning
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
The invention discloses a high-pressure PTC water heater test bench and a heater test method thereof, and relates to the technical field of heater tests. The invention comprises a test bench, wherein a positioning and conveying mechanism is arranged on the test bench and comprises a positioning seat which is in sliding fit in the test bench, a first driving mechanism for driving the positioning seat to slide is arranged on the test bench, two U-shaped transmission plates are in opposite sliding fit on the positioning seat, and a positioning plate is arranged at the first end of the U-shaped transmission plate. According to the invention, the positioning and conveying mechanism is arranged, so that the two U-shaped transmission plates can slide in opposite directions through the second driving mechanism, the positioning plate is driven to clamp the PTC heater, the PTC heater is conveyed to the position below the temperature detector through the first driving mechanism, the positioning and conveying of the PTC heater are integrated, the positioning and conveying efficiency in the necessary step for testing the PTC heater is improved, and the testing efficiency of the PTC heater is improved.
Description
Technical Field
The invention belongs to the field of heater testing, and particularly relates to a high-pressure PTC water heater test bench and a heater testing method thereof.
Background
The PTC heater is characterized by safety performance, and can not generate the phenomenon of 'redness' on the surface of the electric heating tube type heater under any application condition, thereby causing potential safety hazards such as scalds, fires and the like.
When the PTC heater is used for power test, PTC heater power test equipment is needed, and the existing PTC heater power test equipment has the following defects: the existing PTC heater power test equipment needs workers to check test data in real time, and the workers are required to judge whether products are qualified according to the test data, so that the judgment accuracy and the judgment efficiency of the PTC heater are reduced.
The present invention has been made in view of this.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a high-pressure PTC water heater test bench and a heater test method thereof.
In order to solve the technical problems, the invention adopts the basic conception of the technical scheme that:
the test bench comprises a test bench, wherein a positioning conveying mechanism is arranged on the test bench, the positioning conveying mechanism comprises a positioning seat which is in sliding fit with the test bench, a first driving mechanism for driving the positioning seat to slide is arranged on the test bench, two U-shaped transmission plates are in opposite sliding fit with the positioning seat, a positioning plate is arranged at the first end of the U-shaped transmission plate, and a second driving mechanism for driving the two U-shaped transmission plates to slide in opposite directions is arranged in the positioning seat;
the vertical sliding fit has temperature detector on the testboard, be equipped with on the testboard and be used for the drive temperature detector vertical sliding's third actuating mechanism, be equipped with the mounting panel on the testboard, be equipped with detector, pilot lamp group on the mounting panel, be equipped with intelligent computer on the mounting panel, intelligent computer with temperature detector the pilot lamp group electric connection.
Optionally, the pilot lamp group is including installing red light, yellow light, the green light on the mounting panel, red light yellow light green light from the top down sets gradually on the mounting panel.
Optionally, the testboard is a solar-shaped plate body structure, be equipped with first slide, second slide on the testboard, the positioning seat includes U type connecting plate, installs U type seat on the U type connecting plate.
Optionally, the first actuating mechanism is including installing servo motor on the testboard, install the screw thread pull rod of servo motor output, just the screw thread pull rod with U type connecting plate screw thread cooperation.
Optionally, bearings are embedded in two opposite sides of the test bench, and two ends of the threaded pull rod are respectively provided with a smooth curved surface and are respectively fixed in the two bearings.
Optionally, the second actuating mechanism is including locating the third slide of U type seat side, install biax in the third slide stretches the motor, biax stretches the motor both ends and all is equipped with the screw thread push rod, and two the screw thread push rod respectively with two U type connecting plate second end screw thread fit.
Optionally, the two opposite sides of the U-shaped seat are provided with guide holes, and the first end of the U-shaped transmission plate is in sliding fit in the guide holes.
Optionally, vertical sliding fit has L type connecting plate on the testboard, L type connecting plate includes the riser, installs the diaphragm of riser one side, temperature detector installs the diaphragm bottom surface.
Optionally, the third actuating mechanism is including installing driving motor on the testboard, install screw drive pole on the driving motor output, install the deflector of testboard one side, screw drive pole with bellying screw fit, riser one side is equipped with the bellying, deflector one side is equipped with the direction spout, bellying sliding fit is in the direction spout, the bellying the direction spout cross section is T font structure.
A testing method of a high-pressure PTC water heater comprises the following steps:
step 1, placing a PTC heater on the test bench, clamping and positioning by the positioning conveying mechanism, and conveying the PTC heater to the position below the temperature detector by the positioning conveying mechanism;
step 3, starting the intelligent computer, the detector and the indicator lamp set, and starting the PTC heater after connecting the PTC heater with the detector;
and 4, when the heat and the consumed power generated by the PTC heater accord with the preset good threshold, the green light is turned on, when the heat and the consumed power generated by the PTC heater accord with the preset good threshold, the yellow light is turned on, and when the heat and the consumed power generated by the PTC heater do not reach the preset good threshold, the red light is turned on.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects, and of course, any product for implementing the invention does not necessarily need to achieve all the following advantages at the same time:
through setting up location conveying mechanism, be convenient for slide in opposite directions through two U type drive plates of second actuating mechanism, and then drive the tight PTC heater of locating plate clamp, and through first actuating mechanism, carry PTC heater to temperature detector below, be convenient for make PTC heater location transport integrative, be convenient for improve PTC heater test with the location conveying efficiency in the must step, and then improve PTC heater's test efficiency, through setting up temperature detector, third actuating mechanism, whether be convenient for detect PTC heater's heating temperature up to standard, detect power and judge whether qualified for among the prior art, increase whether the detection of whether the product function up to standard, be convenient for improve the comprehensiveness of detection, through setting up the pilot lamp group, be convenient for through observing the pilot lamp group, can judge PTC heater product excellence or disqualification condition fast, and is simple and clear, look over complicated data relatively, judging efficiency has been improved, and then further improve PTC heater's detection efficiency.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The drawings in the following description are only examples of embodiments from which other drawings may be derived by those skilled in the art without the exercise of inventive faculty. In the drawings:
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a first drive mechanism according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a second drive mechanism according to an embodiment of the present invention;
FIG. 4 is an exploded view of one embodiment of the present invention;
FIG. 5 is a cross-sectional view of a third drive mechanism according to an embodiment of the present invention;
in the drawings, the list of components represented by the various numbers is as follows:
test bench 1, first slide 101, second slide 102, positioning seat 2, U-shaped connecting plate 201, U-shaped seat 202, third slide 203, guiding hole 204, U-shaped transmission plate 3, positioning plate 4, first actuating mechanism 5, servo motor 501, threaded pull rod 502, second actuating mechanism 6, double-shaft extension motor 602, threaded push rod 603, temperature detector 7, third actuating mechanism 8, driving motor 801, threaded transmission rod 802, guiding plate 803, guiding chute 804, mounting plate 9, detector 10, indicator lamp group 11, red lamp 111, yellow lamp 112, green lamp 113, bearing 12, L-shaped connecting plate 13, vertical plate 1301, transverse plate 1302, boss 1303, intelligent computer 14.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings.
Referring to fig. 1-5, in this embodiment, a high-voltage PTC water heater test bench is provided, which includes a test bench 1, a positioning and conveying mechanism is provided on the test bench 1, the positioning and conveying mechanism includes a positioning seat 2 slidably fitted in the test bench 1, a first driving mechanism 5 for driving the positioning seat 2 to slide is provided on the test bench 1, two U-shaped transmission plates 3 are slidably fitted on the positioning seat 2 in opposite directions, a positioning plate 4 is provided at a first end of the U-shaped transmission plate 3, and a second driving mechanism 6 for driving the two U-shaped transmission plates 3 to slide in opposite directions is provided in the positioning seat 2;
the vertical sliding fit has temperature detector 7 on test bench 1, and test bench 1 is equipped with the third actuating mechanism 8 that is used for driving temperature detector 7 vertical slip on the test bench 1, is equipped with mounting panel 9 on the test bench 1, is equipped with detector 10, pilot lamp group 11 on the mounting panel 9, is equipped with intelligent computer 14 on the mounting panel 9, intelligent computer 14 and temperature detector 7, detector 10, pilot lamp group 11 electric connection.
Through setting up location conveying mechanism, be convenient for slide in opposite directions through two U type drive plates 3 of second actuating mechanism 6, and then drive locating plate 4 and press from both sides tight PTC heater, and through first actuating mechanism 5, carry the PTC heater to temperature detector 7 below, be convenient for make PTC heater location transport integrative, be convenient for improve PTC heater test with the location conveying efficiency in the must step, and then improve PTC heater's test efficiency, through setting up temperature detector 7, third actuating mechanism 8, whether be convenient for detect PTC heater's heating temperature up to standard, detect power and judge whether qualified for among the prior art, increase whether the detection that the product function reached standard, be convenient for improve the comprehensiveness of detection, through setting up pilot lamp group 11, be convenient for through observing pilot lamp group 11, can judge PTC heater product excellence or disqualification condition fast, simple and clear, relatively look over complicated data, judging efficiency has been improved, and then further PTC heater's detection efficiency is improved.
The indicator lamp set 11 of this embodiment includes red 111, yellow 112, green 113 that install on mounting panel 9, red 111, yellow 112, green 113 from the top down sets gradually on mounting panel 9, and the green 113 of being convenient for when PTC heater produced heat and consumption power accords with the good threshold that presets, and when PTC heater produced heat and consumption power accord with the good threshold that presets, yellow 112 lights, and when PTC heater produced heat and consumption power did not reach the good threshold that presets, red 111 lights, and then is convenient for judge PTC heater product good or disqualification condition fast through looking at indicator lamp set 11.
The test board 1 of this embodiment is a solar-shaped board structure, and the test board 1 is provided with a first slide way 101 and a second slide way 102, and the positioning seat 2 comprises a U-shaped connecting plate 201 and a U-shaped seat 202 arranged on the U-shaped connecting plate 201, so that the positioning seat 2 can stably slide on the test board 1.
The first driving mechanism 5 of this embodiment includes a servo motor 501 installed on the test bench 1, a threaded pull rod 502 installed at the output end of the servo motor 501, and the threaded pull rod 502 is in threaded fit with the U-shaped connecting plate 201, bearings 12 are embedded in two opposite sides of the test bench 1, smooth curved surfaces are respectively arranged at two ends of the threaded pull rod 502, the two ends of the threaded pull rod 502 are respectively fixed in the two bearings 12, the servo motor 501 is conveniently started to drive the threaded pull rod 502 to drive the positioning seat 2 to slide, the PTC heater is driven to be conveyed to the position right below the temperature detector 7, and the stability of the rotation of the threaded pull rod 502 is conveniently improved by setting the bearings 12.
The second driving mechanism 6 of this embodiment includes a third slide 203 disposed on the side of the U-shaped seat 202, a dual-shaft extending motor 602 disposed in the third slide 203, threaded push rods 603 disposed at two ends of the dual-shaft extending motor 602, and two threaded push rods 603 respectively in threaded engagement with the second ends of the two U-shaped connecting plates 201, so as to facilitate opening the dual-shaft extending motor 602 to drive the two U-shaped driving plates 3 to slide in opposite directions through the threaded push rods 603, and further drive the positioning plate 4 to clamp the PTC heater, guide holes 204 are disposed on two opposite sides of the U-shaped seat 202, and the first ends of the U-shaped driving plates 3 are slidably engaged in the guide holes 204, so as to facilitate improving the sliding stability of the U-shaped driving plates 3.
The test bench 1 of the embodiment is vertically and slidably matched with an L-shaped connecting plate 13, the L-shaped connecting plate 13 comprises a vertical plate 1301 and a transverse plate 1302 arranged on one side of the vertical plate 1301, the temperature detector 7 is arranged on the bottom surface of the transverse plate 1302, the third driving mechanism 8 comprises a driving motor 801 arranged on the test bench 1, a threaded transmission rod 802 arranged on the output end of the driving motor 801 and a guide plate 803 arranged on one side of the test bench 1, the threaded transmission rod 802 is in threaded fit with the protruding part 1303, so that the driving motor 801 is conveniently started to drive the threaded transmission rod 802 to drive the L-shaped connecting plate 13 and the temperature detector 7 to slide downwards, and the temperature detector 7 is attached to the upper side of the PTC heater; the riser 1301 one side is equipped with bellying 1303, and deflector 803 one side is equipped with direction spout 804, and bellying 1303 sliding fit is in direction spout 804, and bellying 1303, direction spout 804 cross section are T font structure, are convenient for improve the stability of L type connecting plate 13, temperature detector 7 gliding.
A testing method of a high-pressure PTC water heater comprises the following steps:
step 1, placing a PTC heater on a test bench 1, clamping and positioning by a positioning conveying mechanism, and conveying the PTC heater to the position below a temperature detector 7 by the positioning conveying mechanism;
step 3, starting the intelligent computer 14, the detector 10 and the indicator lamp set 11, connecting the PTC heater with the detector 10, and starting the PTC heater;
Working principle: step 1, placing a PTC heater on a test bench 1, clamping and positioning the PTC heater by a positioning conveying mechanism, placing the PTC heater between two positioning plates 4 on the test bench 1, then starting a double-shaft extension motor 602, driving two U-shaped transmission plates 3 to slide in opposite directions by a threaded push rod 603, further driving the positioning plates 4 to clamp the PTC heater, conveying the PTC heater to the position below a temperature detector 7 by the positioning conveying mechanism, and then starting a servo motor 501 to drive a threaded pull rod 502 to drive a positioning seat 2 to slide, and driving the PTC heater to be conveyed to the position below the temperature detector 7;
step 3, starting the intelligent computer 14, the detector 10 and the indicator lamp set 11, connecting the PTC heater with the detector 10, and starting the PTC heater;
What is not described in detail in this specification is prior art known to those skilled in the art.
The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions. The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (10)
1. A high pressure PTC water heater test bench comprising: the test bench (1), be equipped with location conveying mechanism on test bench (1), location conveying mechanism is in including sliding fit positioning seat (2) in test bench (1), be equipped with on test bench (1) be used for driving first actuating mechanism (5) of positioning seat (2) gliding, sliding fit has two U type drive plates (3) in opposite directions on positioning seat (2), U type drive plate (3) first end is equipped with locating plate (4), be equipped with in positioning seat (2) and be used for driving two second actuating mechanism (6) of U type drive plate (3) gliding in opposite directions;
the test bench (1) is vertically matched with the temperature detector (7) in a sliding manner, the test bench (1) is provided with a third driving mechanism (8) for driving the temperature detector (7) to vertically slide, the test bench (1) is provided with a mounting plate (9), the mounting plate (9) is provided with a detector (10) and an indicator lamp set (11), the mounting plate (9) is provided with an intelligent computer (14), the intelligent computer (14) and the temperature detector (7) are electrically connected with the detector (10) and the indicator lamp set (11).
2. The high-pressure PTC water heater test bench according to claim 1, wherein said indicator light assembly (11) comprises a red light (111), a yellow light (112) and a green light (113) mounted on said mounting plate (9), said red light (111), said yellow light (112) and said green light (113) being mounted on said mounting plate (9) in sequence from top to bottom.
3. The high-pressure PTC water heater test bench according to claim 1, wherein the test bench (1) is of a solar-shaped plate body structure, a first slide way (101) and a second slide way (102) are arranged on the test bench (1), and the positioning seat (2) comprises a U-shaped connecting plate (201) and a U-shaped seat (202) arranged on the U-shaped connecting plate (201).
4. A high pressure PTC water heater test bench according to claim 3, characterized in that said first driving mechanism (5) comprises a servo motor (501) mounted on said test bench (1), a threaded pull rod (502) mounted on the output of said servo motor (501), and said threaded pull rod (502) is in threaded engagement with said U-shaped connection plate (201).
5. The high-pressure PTC water heater test bench according to claim 4, wherein bearings (12) are embedded in opposite sides of the test bench (1), and both ends of the threaded pull rod (502) are provided with smooth curved surfaces and are respectively fixed in the two bearings (12).
6. The high-pressure PTC water heater test bench according to claim 4, wherein said second driving mechanism (6) comprises a third slide (203) disposed on the side surface of said U-shaped seat (202), and a dual-shaft motor (602) disposed in said third slide (203), wherein threaded push rods (603) are disposed at both ends of said dual-shaft motor (602), and said threaded push rods (603) are respectively screwed with the second ends of said two U-shaped connection plates (201).
7. A high pressure PTC water heater test bench according to claim 4, wherein said U-shaped seat (202) is provided with guide holes (204) on opposite sides thereof, and said first end of said U-shaped drive plate (3) is slidably fitted in said guide holes (204).
8. A high-pressure PTC water heater test bench according to claim 1, characterized in that the test bench (1) is vertically slidably fitted with an L-shaped connection plate (13), the L-shaped connection plate (13) comprises a riser (1301), a transverse plate (1302) mounted on one side of the riser (1301), and the temperature detector (7) is mounted on the bottom surface of the transverse plate (1302).
9. The high-pressure PTC water heater test bench according to claim 8, wherein said third driving mechanism (8) comprises a driving motor (801) mounted on said test bench (1), a screw driving rod (802) mounted on the output end of said driving motor (801), a guide plate (803) mounted on one side of said test bench (1), said screw driving rod (802) being screw-fitted with said protrusion (1303), a protrusion (1303) being provided on one side of said vertical plate (1301), a guide chute (804) being provided on one side of said guide plate (803), said protrusion (1303) being slidably fitted in said guide chute (804), and said protrusion (804) and said guide chute (804) being of T-shaped cross section.
10. The testing method for the high-pressure PTC water heater is characterized by comprising the following steps of:
step 1, placing a PTC heater on the test bench (1), clamping and positioning by the positioning conveying mechanism, and conveying the PTC heater to the position below the temperature detector (7) by the positioning conveying mechanism;
step 2, starting the third driving mechanism (8) to drive the temperature detector (7) to slide downwards, so that the temperature detector (7) is attached to the upper side of the PTC heater;
step 3, starting the intelligent computer (14), the detector (10) and the indicator lamp group (11), and starting the PTC heater after connecting the PTC heater with the detector (10);
and 4, when the heat and the consumed power generated by the PTC heater accord with the preset good threshold, the green light (113) is turned on, when the heat and the consumed power generated by the PTC heater accord with the preset good threshold, the yellow light (112) is turned on, and when the heat and the consumed power generated by the PTC heater do not reach the preset good threshold, the red light (111) is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310406943.3A CN116359601A (en) | 2023-04-17 | 2023-04-17 | High-pressure PTC water heater test bench and heater test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310406943.3A CN116359601A (en) | 2023-04-17 | 2023-04-17 | High-pressure PTC water heater test bench and heater test method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116359601A true CN116359601A (en) | 2023-06-30 |
Family
ID=86933395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310406943.3A Pending CN116359601A (en) | 2023-04-17 | 2023-04-17 | High-pressure PTC water heater test bench and heater test method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116359601A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117420401A (en) * | 2023-11-20 | 2024-01-19 | 东莞市台易电子科技有限公司 | High-voltage insulation test equipment for oil pressure fixation of heating tube |
| CN118294764A (en) * | 2024-04-08 | 2024-07-05 | 芜湖华族新能源材料有限公司 | Testing method for testing equipment of new energy PTC liquid heater |
-
2023
- 2023-04-17 CN CN202310406943.3A patent/CN116359601A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117420401A (en) * | 2023-11-20 | 2024-01-19 | 东莞市台易电子科技有限公司 | High-voltage insulation test equipment for oil pressure fixation of heating tube |
| CN118294764A (en) * | 2024-04-08 | 2024-07-05 | 芜湖华族新能源材料有限公司 | Testing method for testing equipment of new energy PTC liquid heater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116359601A (en) | High-pressure PTC water heater test bench and heater test method thereof | |
| US11415557B2 (en) | Tempo-spatial evolution test system for rock breaking in deep and complex environment | |
| CN102183365B (en) | Experiment console and control method for durability of automobile window glass lifter | |
| CN205809265U (en) | A kind of automanual system for switch power supply aging test with performance test | |
| CN112317361A (en) | Tap gas tightness detection device | |
| CN112881904B (en) | Gas relay calibrator | |
| CN212008137U (en) | Display screen test fixture | |
| CN210015181U (en) | Air conditioner electrical inspection tool | |
| CN210587988U (en) | Oil pipe installation and test device for clutch master cylinder | |
| CN209247937U (en) | A kind of separable connector rear joint delivery test tooling | |
| CN216646731U (en) | Multi-functional test fixture of PCBA is filled in journey | |
| CN107894524B (en) | Easily-installed and easily-detached ammeter | |
| CN104400427A (en) | Assembly table based on grouping technique | |
| CN202749518U (en) | Stationary fixture with adjustable clamping distance used on high-current bus | |
| CN218158820U (en) | Detection apparatus convenient to assemble vehicle air conditioner controller | |
| CN213902844U (en) | Utensil of examining of continuous detection car pipe fitting | |
| CN218062926U (en) | Electro-hydraulic comprehensive experiment table | |
| EP4390333A1 (en) | Flow test tool, negative pressure formation apparatus, and battery manufacturing device | |
| CN207752039U (en) | A kind of bundle assembly monitor station for gearbox wiring harness | |
| CN109176387A (en) | Anti- striker assembling fixture for PCBA | |
| CN221074801U (en) | Servo booster | |
| CN211840925U (en) | Limiting plate assembling device for lifting hook protector of hoisting machinery | |
| CN221174479U (en) | Quick detection table for fuel cell membrane electrode | |
| CN220418807U (en) | Work detection table capable of simultaneously detecting electromagnetic valve performance and gas leakage of gas valve | |
| CN218917466U (en) | Electric brush slip ring test workbench |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |