CN220046411U - Electric dental treatment chair steam parameter testing system - Google Patents
Electric dental treatment chair steam parameter testing system Download PDFInfo
- Publication number
- CN220046411U CN220046411U CN202321459220.1U CN202321459220U CN220046411U CN 220046411 U CN220046411 U CN 220046411U CN 202321459220 U CN202321459220 U CN 202321459220U CN 220046411 U CN220046411 U CN 220046411U
- Authority
- CN
- China
- Prior art keywords
- electromagnetic valve
- valve
- way valve
- treatment chair
- dental treatment
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 abstract description 21
- 230000005611 electricity Effects 0.000 abstract description 6
- 238000010926 purge Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 208000018035 Dental disease Diseases 0.000 description 1
- 208000014151 Stomatognathic disease Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Abstract
The utility model discloses an electric dental treatment chair water-gas parameter testing system, which comprises a first three-way valve, a second three-way valve, a first four-way valve, a second four-way valve, a controller, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a first pressure transmitter, a second pressure transmitter, a liquid flowmeter and a gas flowmeter, wherein the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the first pressure transmitter, the second pressure transmitter, the liquid flowmeter and the gas flowmeter are electrically connected with the controller; through the ingenious combination of water and air pipelines, the automatic detection of water and electricity parameters under the general condition is finished, the waterway is communicated with the air circuit in a controlled way, the characteristics of compressed air are fully utilized through the automatic switching combination of each electromagnetic valve under the premise that the waterway is being supplied, the automatic detection of the pipeline tightness of the electric dental treatment chair and the purging cleaning after the test are skillfully finished, the accuracy and the reliability of the test result are ensured, and the test efficiency is greatly improved.
Description
Technical Field
The utility model relates to the field of electric dental treatment chairs, in particular to a water-gas parameter testing system of an electric dental treatment chair.
Background
The electric dental treatment chair is modern medical equipment with high integration of technologies such as machinery, electricity, gas, light and the like, and is very important for guaranteeing the functions of people in the oral health and dental disease treatment process; because the electric dental treatment chair is highly integrated equipment, the requirement on water vapor is relatively high when the electric dental treatment chair is used, in the process of automatically detecting the treatment chair, the external treatment chair is required to provide water vapor resources meeting the requirement, and the performance parameters, the supply route, the supply moment and the like of water and gas are set and switched according to the requirement of the detection process, if manual setting is used, the problems of complicated operation, easy error and the like exist; therefore, there is an urgent need for an electric dental chair water-gas parameter testing system to automatically detect water and gas parameters, and automatically set and switch water and gas supply paths at specific moments according to the needs of the testing process.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a water vapor parameter testing system of an electric dental treatment chair.
The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows: the system comprises a first three-way valve, a second three-way valve, a first four-way valve, a second four-way valve, a controller, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a first pressure transmitter, a second pressure transmitter, a liquid flowmeter and a gas flowmeter, wherein the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the first pressure transmitter, the second pressure transmitter, the liquid flowmeter and the gas flowmeter are electrically connected with the controller;
the first four-way valve is connected with the total water interface through a first electromagnetic valve, connected with the liquid flowmeter through a second electromagnetic valve, connected with the first three-way valve through a third electromagnetic valve and connected with the second four-way valve through a fourth electromagnetic valve;
the first three-way valve is connected with a water supply interface of the first pressure transmitter and the electric dental treatment chair;
the second four-way valve is connected with the total gas interface, is connected with the second three-way valve through a fifth electromagnetic valve and is connected with the gas flowmeter through a sixth electromagnetic valve;
the second three-way valve is connected with the second pressure transmitter and the air supply interface of the electric dental treatment chair.
Further, the system for testing the water and gas parameters of the electric dental treatment chair further comprises a third three-way valve and a seventh electromagnetic valve, wherein the third three-way valve is connected with the liquid flowmeter, is connected with the first four-way valve through the second electromagnetic valve and is connected with a spittoon sewer pipe of the electric dental treatment chair through the seventh electromagnetic valve.
Further, the electric dental treatment chair water-gas parameter testing system further comprises a fourth three-way valve which is respectively connected with the total gas interface, the second four-way valve and the three-way gun workbench of the electric dental treatment chair.
Further, the electric dental chair water vapor parameter testing system further comprises a first filter connected between the total water interface and the first four-way valve.
Further, the electric dental chair water-gas parameter testing system further comprises a second filter connected between the total gas interface and the second four-way valve.
The utility model has the beneficial effects that: the system comprises a first three-way valve, a second three-way valve, a first four-way valve, a second four-way valve, a controller, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a first pressure transmitter, a second pressure transmitter, a liquid flowmeter and a gas flowmeter, wherein the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the first pressure transmitter, the second pressure transmitter, the liquid flowmeter and the gas flowmeter are electrically connected with the controller; the first four-way valve is connected with the total water interface through a first electromagnetic valve, connected with the liquid flowmeter through a second electromagnetic valve, connected with the first three-way valve through a third electromagnetic valve and connected with the second four-way valve through a fourth electromagnetic valve; the first three-way valve is connected with a water supply interface of the first pressure transmitter and the electric dental treatment chair; the second four-way valve is connected with the total gas interface, is connected with the second three-way valve through a fifth electromagnetic valve and is connected with the gas flowmeter through a sixth electromagnetic valve; the second three-way valve is connected with a second pressure transmitter and an air supply interface of the electric dental treatment chair; through the ingenious combination of water and air pipelines, the automatic detection of water and electricity parameters under the general condition is finished, the waterway is communicated with the air circuit in a controlled way, the characteristics of compressed air are fully utilized through the automatic switching combination of each electromagnetic valve under the premise that the waterway is being supplied, the automatic detection of the pipeline tightness of the electric dental treatment chair and the purging cleaning after the test are skillfully finished, the accuracy and the reliability of the test result are ensured, and the test efficiency is greatly improved.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a piping wiring diagram of an electric dental chair moisture parameter testing system.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless clearly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be connected directly or indirectly through an intermediary; the connecting device can be fixedly connected, detachably connected and integrally formed; may be a mechanical connection; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.
Referring to fig. 1, an electric dental treatment chair moisture parameter testing system includes a first three-way valve 11, a second three-way valve 12, a first four-way valve 13, a second four-way valve 14, a controller, a first solenoid valve 21, a second solenoid valve 22, a third solenoid valve 23, a fourth solenoid valve 24, a fifth solenoid valve 25, a sixth solenoid valve 26, a first pressure transmitter 31, a second pressure transmitter 32, a liquid flow meter 40, and a gas flow meter 50 electrically connected to the controller;
the first four-way valve 13 is connected with the total water interface 60 through the first electromagnetic valve 21, with the liquid flowmeter 40 through the second electromagnetic valve 22, with the first three-way valve 11 through the third electromagnetic valve 23 and with the second four-way valve 14 through the fourth electromagnetic valve 24;
the first three-way valve 11 is connected with a first pressure transmitter 31 and a water supply interface of the electric dental treatment chair;
the second four-way valve 14 is connected with the total gas interface 70, the second three-way valve 12 through the fifth electromagnetic valve 25 and the gas flowmeter 50 through the sixth electromagnetic valve 26;
the second three-way valve 12 is connected to the air supply interface of the second pressure transducer 32 and the electric dental chair.
The system for testing the moisture parameters of the electric dental treatment chair further comprises a third three-way valve 15 and a seventh electromagnetic valve 27, wherein the third three-way valve 15 is connected with the liquid flowmeter 40, is connected with the first four-way valve 13 through the second electromagnetic valve 22 and is connected with the spittoon sewer pipe of the electric dental treatment chair through the seventh electromagnetic valve 27.
The system for testing the moisture parameters of the electric dental treatment chair further comprises a fourth three-way valve 16 connected with the total air interface 70, the second four-way valve 14 and the three-way gun workbench of the electric dental treatment chair respectively.
The system for testing the moisture parameters of the electric dental treatment chair further comprises a first filter 81 connected between the total water port 60 and the first four-way valve 13 and a second filter 82 connected between the total air port 70 and the second four-way valve 14.
The main functions in the utility model are as follows:
1. filtering the inlet water, detecting the water pressure and the flow, and determining whether the inlet water meets the use requirement;
2. filtering the air inlet, detecting the air pressure and the flow, and determining whether the air inlet meets the use requirement;
3. providing water and gas resources meeting the requirements for the detection device;
4. the detection of the pipeline tightness of the dental treatment chair is completed by matching with the control program of the detection device;
5. after the test is finished, purging all the water vapor pipelines of the treatment chair by matching with the detection device, and removing moisture residues in the pipelines of the treatment chair to avoid spoilage and bacteria breeding;
specifically, the implementation principle of each function is as follows:
1. waterway detection function
After the pressure water entering the water inlet pipeline is filtered by the first filter 81, the pressure water enters the first four-way valve 13 through the electromagnetic valve 31, and at the moment, the fourth electromagnetic valve 24 is closed;
when the second electromagnetic valve 22 is closed and the third electromagnetic valve 23 is opened, the pressure water enters the first three-way valve 11 through the first four-way valve 13 and the third electromagnetic valve 23, and is connected with the first water pressure transmitter 31 through one outlet of the first three-way valve 11, and when the electromagnetic valve at the water supply interface of the electric dental treatment chair is closed, the water supply interface of the electric dental treatment chair has no water flow, and at the moment, the pressure value measured on the first pressure transmitter 31 is the current water pressure of water supply, so that whether the water supply meets the use requirement is judged;
when the second electromagnetic valve 22 is opened, the third electromagnetic valve 23 is closed, and the seventh electromagnetic valve 27 is closed, the pressurized water is directly supplied to the liquid flowmeter 40 along the first four-way valve 13, the second electromagnetic valve 22 and the third three-way valve 15, the output of the liquid flowmeter 40 is connected with a waste water pipe (not marked in the figure), and when the water flows through the liquid flowmeter 40, the liquid flowmeter 40 measures the water flow rate and judges whether the use requirement is met;
2. gas circuit detection function
Compressed air entering the air path pipeline is filtered by the second filter 82 and then is connected into the fourth three-way valve 16, the electromagnetic valve on the pipeline of the fourth three-way valve 16 to the three-way gun workbench is closed, and the compressed air enters the second four-way valve 14 through the other path of the fourth three-way valve 16, and at the moment, the fourth electromagnetic valve 24 is closed;
when the fifth electromagnetic valve 25 is opened and the sixth electromagnetic valve 26 is closed, gas enters the second three-way valve 12 through the second four-way valve 14 and the fifth electromagnetic valve 25, one outlet of the second three-way valve 12 is connected with the second pressure transmitter 32, when the electromagnetic valve at the gas supply interface of the electric dental treatment chair is closed, no gas flow is arranged in the gas path, but certain gas pressure is maintained, the pressure measured by the second pressure transmitter 32 is the pressure of the current gas, and whether the gas pressure meets the use requirement is judged according to the pressure;
when the fifth electromagnetic valve 25 is closed and the sixth electromagnetic valve 26 is opened, gas is connected into the gas flowmeter 50 through the sixth electromagnetic valve 26, gas passing through the gas flowmeter 50 is connected into the waste pipe, and when the gas flows through the gas flowmeter 50, the gas flowmeter 50 measures the gas flow and judges whether the use requirement is met;
3. the hydropower module provides water and gas resources for the detection device
When the first electromagnetic valve 21 is opened, the fourth electromagnetic valve 24 is closed, the second electromagnetic valve 22 is closed, and the third electromagnetic valve 23 is opened, the pressure water meeting the pressure and flow requirements is directly supplied to a treatment chair water supply pipeline of the detection device, the detection device takes the pressure water according to the test requirement at any time, and the first pressure transmitter 31 continuously monitors the change of the water pressure;
when the fourth solenoid valve 24 is closed, the sixth solenoid valve 26 is closed, and the fifth solenoid valve 25 is opened, compressed air is directly supplied to the air supply pipeline of the therapeutic chair of the detection device, the detection device can take the compressed air according to the test requirement at any time, and the second pressure transmitter 32 continuously monitors the air pressure change. The method comprises the steps of carrying out a first treatment on the surface of the
Compressed air entering the air path is continuously supplied to the three-purpose gun workbench through one outlet of the fourth tee joint 16, the three-purpose gun workbench can take the compressed air at any time according to the requirement (an eighth electromagnetic valve can be added between the three-purpose gun workbench and the fourth tee joint 16 according to the requirement, and when the three-purpose gun workbench fails, the air supply can be cut off so as not to influence other partial functions)
4. Treatment chair pipeline seal detection
The water channel main valve is closed (no mark), the second electromagnetic valve 22 is closed, the third electromagnetic valve 23 is opened, the fourth electromagnetic valve 24 is opened, the sixth electromagnetic valve 26 is closed, and the fifth electromagnetic valve 25 is opened, so that compressed air from the air channel enters the water channel;
the detection device controls the treatment chair to open all devices using water and air, so that compressed air in the air path blows water in the water-air pipeline in the treatment chair through the waterway pipeline, and then all devices using water and air in the treatment chair are closed;
detecting the pressure of the gas in the pipeline at the moment, closing a gas path main valve (without labels) to continuously detect the gas pressure after the pressure is stable, and determining whether the tightness of the pipeline of the treatment chair meets the requirement through the change of the pressure of the compressed gas in the pipeline after the gas path main valve is positioned for a set time;
5. treatment chair pipeline sweeps
After all tests are finished, the hydropower module closes the waterway main valve, and the detection device controls the treatment chair to open all devices using water and air;
the water way main valve is closed (no mark), the second electromagnetic valve 22 is closed, the third electromagnetic valve 23 is opened, the fourth electromagnetic valve 24 is opened, the sixth electromagnetic valve 26 is closed, and the fifth electromagnetic valve 25 is opened, so that compressed air from the air way enters the water way, all the water and air pipelines are purged through the compressed air, and after a certain time, the moisture in the water and air pipelines is completely blown out and blown dry;
6. the detection device controls the treatment chair to close all the equipment using the water and electricity, and the water and electricity module closes all the electromagnetic valves to finish the test; the utility model has the advantages that: through the ingenious combination to water, air piping, outside accomplishing the automated inspection to water and electricity parameter under the general condition, through setting up fourth solenoid valve 24, make water route and gas circuit controlled intercommunication, under the prerequisite of guaranteeing that the water route is being supplied with, through the automatic switch combination of each solenoid valve, make full use of compressed air's characteristic, ingenious completion is to the automatic detection of electric dental treatment chair's pipeline leakproofness and the clean of blowing after the test, not only guaranteed the accuracy and reliability of test result, still improved test efficiency by a wide margin.
Of course, the present utility model is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications and substitutions without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are included in the scope of the present utility model as defined in the appended claims.
Claims (5)
1. An electric dental treatment chair hydrosphere parameter test system which is characterized in that: the device comprises a first three-way valve (11), a second three-way valve (12), a first four-way valve (13), a second four-way valve (14), a controller, a first electromagnetic valve (21), a second electromagnetic valve (22), a third electromagnetic valve (23), a fourth electromagnetic valve (24), a fifth electromagnetic valve (25), a sixth electromagnetic valve (26), a first pressure transmitter (31), a second pressure transmitter (32), a liquid flowmeter (40) and a gas flowmeter (50), wherein the first electromagnetic valve (21), the second electromagnetic valve (22), the third electromagnetic valve (23), the fourth electromagnetic valve (24), the fifth electromagnetic valve (25), the sixth electromagnetic valve (26) are electrically connected with the controller;
the first four-way valve (13) is connected with the total water interface (60) through a first electromagnetic valve (21), is connected with the liquid flowmeter (40) through a second electromagnetic valve (22), is connected with the first three-way valve (11) through a third electromagnetic valve (23) and is connected with the second four-way valve (14) through a fourth electromagnetic valve (24);
the first three-way valve (11) is connected with the first pressure transmitter (31) and a water supply interface of the electric dental treatment chair;
the second four-way valve (14) is connected with a total gas interface (70), a second three-way valve (12) through a fifth electromagnetic valve (25) and the gas flowmeter (50) through a sixth electromagnetic valve (26);
the second three-way valve (12) is connected with a second pressure transmitter (32) and an air supply interface of the electric dental chair.
2. The system for testing the moisture parameters of the electric dental treatment chair according to claim 1, wherein: the device also comprises a third three-way valve (15) and a seventh electromagnetic valve (27), wherein the third three-way valve (15) is connected with the liquid flowmeter (40), is connected with the first four-way valve (13) through the second electromagnetic valve (22) and is connected with a spittoon sewer pipe of the electric dental treatment chair through the seventh electromagnetic valve (27).
3. The system for testing the moisture parameters of the electric dental treatment chair according to claim 1, wherein: the three-way valve also comprises a fourth three-way valve (16) which is respectively connected with the total air interface (70), the second four-way valve (14) and the three-way gun workbench of the electric dental treatment chair.
4. The system for testing the moisture parameters of the electric dental treatment chair according to claim 1, wherein: also comprises a first filter (81) connected between the total water interface (60) and the first four-way valve (13).
5. The system for testing the moisture parameters of the electric dental treatment chair according to claim 1, wherein: also included is a second filter (82) coupled between the total air port (70) and the second four-way valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321459220.1U CN220046411U (en) | 2023-06-08 | 2023-06-08 | Electric dental treatment chair steam parameter testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321459220.1U CN220046411U (en) | 2023-06-08 | 2023-06-08 | Electric dental treatment chair steam parameter testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220046411U true CN220046411U (en) | 2023-11-21 |
Family
ID=88785945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321459220.1U Active CN220046411U (en) | 2023-06-08 | 2023-06-08 | Electric dental treatment chair steam parameter testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220046411U (en) |
-
2023
- 2023-06-08 CN CN202321459220.1U patent/CN220046411U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104406750B (en) | The device for detecting sealability and detection method of a kind of water purification machine | |
| CN103816633A (en) | Intelligent proportionally-mixing system for foam | |
| CN220046411U (en) | Electric dental treatment chair steam parameter testing system | |
| CN105758599A (en) | Automatic leakage detecting device of water heater or wall-hung stove and operating method thereof | |
| CN208208885U (en) | A kind of fuel cell pile air-tightness detection device | |
| CN207301061U (en) | Glue-making tank-reactor glue acidity and viscosity on-line monitoring system | |
| CN109115484A (en) | Valve Auto-Test System and method before a kind of Water meter | |
| CN111458084A (en) | Detection equipment of water purifier and detection method of water purifier adopting detection equipment | |
| CN204314029U (en) | A kind of device for detecting sealability of water purification machine | |
| CN208984695U (en) | A kind of equipment of automatically testing urea pump performance | |
| CN110726547A (en) | Portable comprehensive checking device for pressure protection device | |
| CN110095232A (en) | A kind of air-tightness detection method of expansion tank | |
| CN114414171A (en) | Water purifier detection method | |
| CN205478379U (en) | Self priming centrifugal pump and pump controller testboard | |
| CN220188031U (en) | Electric dental treatment chair mobile phone testing system | |
| CN211133207U (en) | Online integrity detection system applied to liquid filter element of liquid preparation system | |
| CN106839866A (en) | A kind of cleaning solution heat-exchange device shuts down Automatic Maintenance System | |
| CN112834240A (en) | Leakage desorption flow test detection system | |
| CN207335996U (en) | A kind of detection device for endoscope air-tightness | |
| CN214010665U (en) | Condenser leak detection device | |
| CN211904578U (en) | Detection equipment of water purifier | |
| CN214583908U (en) | Pipeline dead water section sealing test machine | |
| CN219836071U (en) | Terminal water test device of automatic water spraying fire extinguishing system | |
| CN216798954U (en) | Water purifier detection device | |
| CN208712373U (en) | A kind of pipe-line system for cleaning dipper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |