CN112230417A - High-precision device for implanting ceramic particles - Google Patents
High-precision device for implanting ceramic particles Download PDFInfo
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- CN112230417A CN112230417A CN202011153243.0A CN202011153243A CN112230417A CN 112230417 A CN112230417 A CN 112230417A CN 202011153243 A CN202011153243 A CN 202011153243A CN 112230417 A CN112230417 A CN 112230417A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/32—Micromanipulators structurally combined with microscopes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
Abstract
The invention discloses a high-precision device for implanting ceramic particles, which comprises a light radiation press machine, an operation box and an electron microscope eyepiece, wherein a light pressure cavity is arranged inside the light radiation press machine, a light pressure generator I is arranged inside the light pressure cavity, a light pressure generator II is arranged on one side of the light pressure generator I, an operation platform is welded at the top of the light radiation press machine, and the operation box is arranged at the bottom of the light radiation press machine. The device sets up anti-dazzle lens on electron microscope's eyepiece, can avoid the experimenter to open electron microscope when, the highlight sees through objective and shoots the electron microscope eyepiece on and injure operator's eye.
Description
The application is a divisional application of an invention patent application with the application number of 201810741210.4, wherein the application date of the invention is 2018, 07, 08 and the name of the invention is 'a method and a device for implanting optical tweezers particles into high-precision ceramics'.
Technical Field
The invention relates to a high-precision device for implanting ceramic particles, belonging to the technical field of optical tweezers research.
Background
The optical tweezers are an optical technology which utilizes optical radiation pressure and single-beam gradient force to generate force when an optical trap acts on particles or cell surfaces, generally, people use the optical tweezers to perform tweezers taking and segmentation on the cells, the particles and biological macromolecules, but at present, researches show that the particles have certain physical property change effect on high-precision ceramic materials, and because the high-precision ceramic materials have higher strength and wear resistance, experimental particles can be implanted into the high-precision ceramic materials in a non-destructive manner only through the action of the optical tweezers.
Therefore, the invention provides a high-precision device for implanting ceramic particles.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for implanting particles into high-precision ceramics, which is used for solving the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a device of particle is implanted to high-accuracy pottery, includes ray radiation press, control box and electron microscope eyepiece, the inside of ray radiation press is provided with the light pressure cavity, the inside of light pressure cavity is provided with light pressure generator one, one side of light pressure generator one is provided with light pressure generator two, the welding of the top of ray radiation press has the platform of controlling, the control box sets up the bottom at the ray radiation press, the welding has the connecting rod on the control box, the control box is connected with the ray radiation press through the connecting rod, the top of control box is installed the end cover, be provided with the condensing lens on the end cover, the inside of control box is provided with the operation cavity, the inside of operation cavity is provided with rotates the chassis, be provided with the experiment operation groove on the rotation chassis, one side of control box is provided with a condensing refraction section of thick bamboo one, gather the inside of photorefraction section of thick bamboo one and be provided with electronic hydraulic stem, the one side of gathering photorefraction section of thick bamboo one is provided with purification board one, the opposite side welding of control box has a photorefraction section of thick bamboo two of gathering, the inside of gathering photorefraction section of thick bamboo two also is provided with electronic hydraulic stem, be provided with the output lever on the electronic hydraulic stem, be provided with the refraction lens on the output lever.
When the device is used for implanting particles, experimenters firstly put high-precision ceramic particles for testing into a dyeing bath, and due to the special oxidation resistance and strong corrosion resistance of high-precision ceramics, a dyeing agent with higher concentration needs to be added into the dyeing bath, and the dyed high-precision ceramic particles are obtained after the ceramic materials are soaked for 5 min;
selection of experimental particles: the experimenter places the particle swarm under an electron microscope, and an operator selects single experimental particles with lower surface roughness and more regular shapes through observation, so that the success of the implantation of experiments is facilitated;
preparing a ceramic material: because high-precision ceramics have higher strength and wear resistance, experimenters need to adopt high-strength crushing equipment to grind dyed ceramic particles, and then place the dyed ceramic powder under an electron microscope, after observation, operators should select high-precision ceramic materials with fewer pores, smoother surfaces and undamaged physical properties;
implantation of experimental particles: the experimenter places the selected experimental particles into an experimental operation groove in an operation box, the operator controls the output power of the first light pressure generator and the second light pressure generator through the observation of an electron microscope eyepiece, so that the first light pressure generator and the second light pressure generator emit laser with energy and momentum, meanwhile, an operator needs to control the electric hydraulic rods in the first light-gathering refraction cylinder and the second light-gathering refraction cylinder through corresponding control buttons on the control platform, thereby controlling the angle of laser refraction, the refracted laser acts on the surface of the particles in the experimental operation groove, the gradient force optical trap can limit the spatial position of the particles, so that the particles can move in an isolated manner, and an experimenter can implant the particles in the selected high-precision ceramic material in an isolated manner by controlling the light radiation press, the first light-gathering refraction cylinder and the second light-gathering refraction cylinder;
recording and observation of the experiment: in the whole process of implanting experimental particles into the high-precision ceramic material, experimenters can observe the change process of the experimental particles and the change of the properties of the high-precision ceramic material through an eyepiece of an electron microscope, then record data, the ceramic material implanted with the experimental particles can generate the change of the moving chemical properties, the change is detected by adopting different oxidants or reducing agents, and the data are finally recorded.
In a preferred embodiment of the present invention, the operation box is provided with an electron microscope box, an electron microscope tube is arranged inside the electron microscope box, and the electron microscope eyepiece is welded to one side of the electron microscope box.
In a preferred embodiment of the present invention, the console is provided with control buttons, and the control buttons are respectively connected to the electro-hydraulic lever, the first optical pressure generator and the second optical pressure generator through wires.
In a preferred embodiment of the present invention, the operation box is provided with an electric sealing door.
In a preferred embodiment of the present invention, the number of the electro-hydraulic rods is 6, and the number of the connecting rods is 2.
As a preferred embodiment of the present invention, the bottom of the first light-gathering and refracting cylinder and the bottom of the second light-gathering and refracting cylinder are both provided with a support seat, and the support seat is provided with a bolt hole.
In a preferred embodiment of the present invention, the light pressure cavity inside the light radiation press is a sealed vacuum cavity.
In a preferred embodiment of the present invention, an electric motor is disposed inside the rotating chassis, and the electric motor is a three-phase asynchronous motor.
As a preferred embodiment of the present invention, the electron microscope eyepiece is provided with an anti-glare shade, one side of the second light-collecting and refracting tube is provided with a second purifying plate, and the second purifying plate is provided with a data line tube.
The invention has the beneficial effects that:
1. according to the process and the device for implanting the optical tweezers particles into the high-precision ceramic, the first light-gathering refraction cylinder and the second light-gathering refraction cylinder are arranged on two sides of the operation box, and an experimenter can control the output power of the light radiation press machine through a control button on an operation table so as to control the intensity of generated light pressure and control the refraction and calibration of laser, so that the air-separating tweezers of the particles are fixed;
2. according to the method and the device for implanting the optical tweezers particles into the high-precision ceramic, the anti-dazzling lens is arranged on the eyepiece of the electron microscope, so that when an experimenter opens the electron microscope, strong light is prevented from penetrating through the objective lens and being emitted onto the eyepiece of the electron microscope to injure the eyes of an operator;
3. the method and the device for implanting the optical tweezers particles into the high-precision ceramic adopt a chemical dyeing technology, the high-precision ceramic material which is difficult to observe can be firstly dyed and then crushed, the generated colored powder ceramic material is convenient for experimental observation, and the success rate of particle implantation is improved.
4. The method and the device for implanting the optical tweezers particles into the high-precision ceramic are novel in design and reasonable in structure, and can complete the work of implanting the particles into the high-precision ceramic material with high precision.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for implanting optical tweezers particles into high precision ceramics according to the present invention;
FIG. 2 is a front view of an apparatus for implanting optical tweezers particles into high precision ceramics according to the present invention;
FIG. 3 is a flow chart of a method of implanting optical tweezers particles into high precision ceramics according to the present invention;
in the figure: the device comprises a 1-light radiation press, a 2-sealing end cover, a 3-light gathering and refracting cylinder II, a 4-purifying plate II, a 5-data line pipe, a 6-control table, a 7-condenser lens, an 8-connecting rod, a 9-operation box, a 10-light gathering and refracting cylinder I, a 11-purifying plate I, a 12-supporting seat, a 13-electron microscope objective box, a 14-electron microscope eyepiece, a 15-refraction lens, a 16-light pressure generator I, a 17-rotating chassis, an 18-experiment operation tank, a 19-light pressure generator II and a 20-electric hydraulic rod.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1 to 3, the present invention provides a technical solution: a specific method for implanting particles in a high-precision ceramic implant particle device comprises the following steps:
dyeing of the ceramic material: experimenters firstly put high-precision ceramic particles for testing into a dyeing bath, and due to the special oxidation resistance and strong corrosion resistance of high-precision ceramics, a dyeing agent with higher concentration needs to be added into the dyeing bath, and the dyed high-precision ceramic particles are obtained after the ceramic materials are soaked for 5 min;
selection of experimental particles: the experimenter places the particle swarm under an electron microscope, and an operator selects single experimental particles with lower surface roughness and more regular shapes through observation, so that the success of the implantation of experiments is facilitated;
preparing a ceramic material: because high-precision ceramics have higher strength and wear resistance, experimenters need to adopt high-strength crushing equipment to grind dyed ceramic particles, and then place the dyed ceramic powder under an electron microscope, after observation, operators should select high-precision ceramic materials with fewer pores, smoother surfaces and undamaged physical properties;
implantation of experimental particles: the experimenter places the selected experimental particles into an experimental operation groove 18 in the operation box 9, the operator controls the output power of the first light pressure generator 16 and the second light pressure generator 19 through the observation of the electron microscope eyepiece 14, so that the two generators emit laser with energy and momentum, meanwhile, the operator needs to control each electric hydraulic rod 20 inside the first condensing and refracting cylinder 10 and the second condensing and refracting cylinder 3 through corresponding control buttons on the console 6, thereby controlling the refraction angle of the laser, the refracted laser acts on the surface of the particles in the experimental operation groove 18, the gradient force optical trap can limit the space position of the particles, so that the particles can move in an isolated manner, and an experimenter can implant the particles into the selected high-precision ceramic material in an isolated manner by controlling the light radiation press machine 1, the first light-gathering refraction cylinder 10 and the second light-gathering refraction cylinder 3;
recording and observation of the experiment: during the whole process of implanting experimental particles into the high-precision ceramic material, experimenters can observe the change process of the experimental particles and the change of the properties of the high-precision ceramic material through an eyepiece 14 of an electron microscope, then record data, and the ceramic material after implanting the experimental particles can generate the change of the moving chemical properties, detect by adopting different oxidants or reducing agents, and finally record the data
Realize a device of particle is implanted to high-accuracy pottery, including ray radiation press 1, control box 9 and electron microscope eyepiece 14, the inside of ray radiation press 1 is provided with the light pressure cavity, the inside of light pressure cavity is provided with light pressure generator 16, one side of light pressure generator 16 is provided with light pressure generator two 19, the welding of the top of ray radiation press 1 has control platform 6, control box 9 sets up in the bottom of ray radiation press 1, the welding has connecting rod 8 on control box 9, control box 9 is connected with ray radiation press 1 through connecting rod 8, end cover 2 is installed at the top of control box 9, be provided with spotlight lens 7 on end cover 2, the inside of control box 9 is provided with the operation cavity, the inside of operation cavity is provided with rotates chassis 17, be provided with experiment operation groove 18 on rotating chassis 17, one side of control box 9 is provided with a spotlight refraction section of thick bamboo 10, the inside of a spotlight refraction section of thick bamboo 10 is provided with electronic hydraulic stem 20, one side of a spotlight refraction section of thick bamboo 10 is provided with purification board 11, the opposite side welding of control box 9 has a spotlight refraction section of thick bamboo two 3, the inside of a spotlight refraction section of thick bamboo two 3 also is provided with electronic hydraulic stem 20, be provided with the output lever on the electronic hydraulic stem 20, be provided with refraction lens 15 on the output lever.
In a preferred embodiment of the present invention, the operation box 9 is provided with an electron microscope box 13, an objective tube is provided inside the electron microscope box 13, and the electron microscope eyepiece 14 is welded to one side of the electron microscope box 13.
In a preferred embodiment of the present invention, the console 6 is provided with control buttons, and the control buttons are respectively connected to the electro-hydraulic rod 20, the first light pressure generator 16 and the second light pressure generator 19 through electric wires.
In a preferred embodiment of the present invention, the operation box 9 is provided with an electric sealing door.
In a preferred embodiment of the present invention, the number of the electro-hydraulic rods 20 is 6, and the number of the connecting rods 8 is 2.
In a preferred embodiment of the present invention, the bottom of the first light-gathering and refracting cylinder 10 and the bottom of the second light-gathering and refracting cylinder 3 are both provided with a support base 12, and the support base 12 is provided with a bolt hole.
In a preferred embodiment of the present invention, the light pressure cavity inside the light radiation press 1 is a sealed vacuum cavity.
In a preferred embodiment of the present invention, an electric motor is disposed inside the rotating chassis 17, and the electric motor is a three-phase asynchronous motor.
In a preferred embodiment of the present invention, the electron microscope eyepiece 14 is provided with an anti-glare light shading sheet, one side of the second light-collecting and refracting tube 3 is provided with a second purifying plate 4, and the second purifying plate 4 is provided with a data line tube 5.
The working principle is as follows: the device for implanting the optical tweezers particles into the high-precision ceramic comprises an operation box 9, an optical radiation press 1, a first condensing refraction cylinder 10 and a second condensing refraction cylinder 3, wherein a first optical pressure generator 16 and a second optical pressure generator 19 in the optical radiation press 1 are used for emitting laser with energy and momentum, an experimenter controls the output power of the first optical pressure generator 16 and the second optical pressure generator 19 through corresponding control buttons on an operation table 6, two beams of laser vertically downwards penetrate through a condensing lens 7 to be emitted into the operation box 9, the two experimenters control a plurality of electric hydraulic rods 20 to work through corresponding control buttons on the operation table 6, the output rods on the electric hydraulic rods 20 are provided with the refracting lenses 15, when the electric hydraulic rods 20 extend out, the refracting lenses 15 can refract the laser, the laser penetrates through different numbers of the refracting lenses 15 and can refract different angles, the method and the device for implanting the optical tweezers particles into the high-precision ceramic are novel in design, reasonable in structure and capable of completing the work of implanting the particles into the high-precision ceramic material with high precision.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a device of particle is implanted to high-accuracy pottery, its characterized in that, includes light radiation press (1), control box (9) and electron microscope eyepiece (14), the inside of light radiation press (1) is provided with the light pressure cavity, the inside of light pressure cavity is provided with light pressure generator (16), one side of light pressure generator (16) is provided with light pressure generator two (19), the top welding of light radiation press (1) has control platform (6), control box (9) set up the bottom at light radiation press (1), the welding has connecting rod (8) on control box (9), control box (9) are connected with light radiation press (1) through connecting rod (8), end cover (2) are installed at the top of control box (9), be provided with condensing lens (7) on end cover (2), the operation box is characterized in that an operation cavity is arranged inside the operation box (9), a rotation chassis (17) is arranged inside the operation cavity, an experiment operation groove (18) is arranged on the rotation chassis (17), a first light gathering and refracting cylinder (10) is arranged on one side of the operation box (9), an electric hydraulic rod (20) is arranged inside the first light gathering and refracting cylinder (10), a first purifying plate (11) is arranged on one side of the first light gathering and refracting cylinder (10), a second light gathering and refracting cylinder (3) is welded on the other side of the operation box (9), an electric hydraulic rod (20) is also arranged inside the second light gathering and refracting cylinder (3), an output rod is arranged on the electric hydraulic rod (20), a refraction lens (15) is arranged on the output rod, an electronic microscope box (13) is arranged on the operation box (9), a microscope tube is arranged inside the electronic microscope box (13), the electronic microscope eyepiece (14) is welded on one side of an electronic microscope box (13), a control button is arranged on the control platform (6), the control button is respectively connected with an electric hydraulic rod (20), a first light pressure generator (16) and a second light pressure generator (19) through electric wires, an electric sealing door is arranged on the operation box (9), a light pressure cavity inside the light radiation press machine (1) is a sealed vacuum cavity, and the first light pressure generator (16) and the second light pressure generator (19) inside the light radiation press machine (1) are used for emitting laser;
when the device is used for implanting particles, experimenters firstly put high-precision ceramic particles for testing into a dyeing bath, and due to the special oxidation resistance and strong corrosion resistance of high-precision ceramics, a dyeing agent with higher concentration needs to be added into the dyeing bath, and the dyed high-precision ceramic particles are obtained after the ceramic materials are soaked for 5 min;
the experimenter places the particle swarm under an electron microscope, and an operator selects single experimental particles with lower surface roughness and more regular shapes through observation, so that the success of the implantation of experiments is facilitated;
because high-precision ceramics have higher strength and wear resistance, experimenters need to adopt high-strength crushing equipment to grind dyed ceramic particles, and then place the dyed ceramic powder under an electron microscope, after observation, operators should select high-precision ceramic materials with fewer pores, smoother surfaces and undamaged physical properties;
the experimental device is characterized in that an experimenter places selected experimental particles into an experimental operation groove (18) in an operation box (9), an operator controls the output power of a first light pressure generator (16) and a second light pressure generator (19) through observation of an electron microscope eyepiece (14) to enable the first light pressure generator and the second light pressure generator to emit laser with energy and momentum, meanwhile, the operator needs to control electric hydraulic rods (20) in a first light gathering refraction barrel (10) and a second light gathering refraction barrel (3) through corresponding control buttons on an operation control table (6) to control the refraction angle of the laser, the refracted laser acts on the surfaces of the particles in the experimental operation groove (18) to generate a gradient force optical trap, the spatial position of the particles can be limited by the gradient force optical trap, the particles can be moved in a spaced mode, and the experimenter can control a light radiation press (1), The first light-gathering refraction cylinder (10) and the second light-gathering refraction cylinder (3) are used for implanting particles into the selected high-precision ceramic material in an isolated mode;
in the whole process of implanting experimental particles into the high-precision ceramic material, an experimenter can observe the change process of the experimental particles and the change of the properties of the high-precision ceramic material through an eyepiece (14) of an electron microscope, then record data, and the ceramic material after the experimental particles are implanted can generate the change of the moving chemical properties, detect by adopting different oxidants or reducing agents, and finally record the data.
2. The apparatus of claim 1, wherein the implant is a high precision ceramic implant: the motor is arranged in the rotating chassis (17) and is a three-phase asynchronous motor.
3. A high precision ceramic implant seed device as recited in claim 2, wherein: be provided with anti-dazzle shade on electron microscope eyepiece (14), one side of spotlight refraction section of thick bamboo two (3) is provided with purifying plate two (4), be provided with data spool (5) on purifying plate two (4).
4. A high precision ceramic implant seed device as recited in claim 3, wherein: the number of the electric hydraulic rods (20) is 6, and the number of the connecting rods (8) is 2.
5. The apparatus of claim 4, wherein the implant is a high precision ceramic implant: the bottom of the first light-gathering refraction cylinder (10) and the bottom of the second light-gathering refraction cylinder (3) are both provided with a supporting seat (12), and bolt holes are formed in the supporting seat (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011153243.0A CN112230417A (en) | 2018-07-08 | 2018-07-08 | High-precision device for implanting ceramic particles |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810741210.4A CN108931846B (en) | 2018-07-08 | 2018-07-08 | Method and device for implanting optical tweezers particles into high-precision ceramic |
| CN202011153243.0A CN112230417A (en) | 2018-07-08 | 2018-07-08 | High-precision device for implanting ceramic particles |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810741210.4A Division CN108931846B (en) | 2018-07-08 | 2018-07-08 | Method and device for implanting optical tweezers particles into high-precision ceramic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112230417A true CN112230417A (en) | 2021-01-15 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011112154.1A Withdrawn CN112198650A (en) | 2018-07-08 | 2018-07-08 | Method for implanting particles into high-precision ceramic |
| CN202011153243.0A Withdrawn CN112230417A (en) | 2018-07-08 | 2018-07-08 | High-precision device for implanting ceramic particles |
| CN201810741210.4A Active CN108931846B (en) | 2018-07-08 | 2018-07-08 | Method and device for implanting optical tweezers particles into high-precision ceramic |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202011112154.1A Withdrawn CN112198650A (en) | 2018-07-08 | 2018-07-08 | Method for implanting particles into high-precision ceramic |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810741210.4A Active CN108931846B (en) | 2018-07-08 | 2018-07-08 | Method and device for implanting optical tweezers particles into high-precision ceramic |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1344432B1 (en) * | 2000-12-21 | 2012-05-02 | The University Court of the University of St. Andrews | Optical rotation of microscopic particles |
| WO2004113957A2 (en) * | 2003-06-16 | 2004-12-29 | The Regents Of The University Of California | Apparatus for optical measurements on low-index non-solid materials based on arrow waveguides |
| WO2005100541A2 (en) * | 2004-04-12 | 2005-10-27 | The Regents Of The University Of California | Optoelectronic tweezers for microparticle and cell manipulation |
| CN101573618A (en) * | 2006-09-15 | 2009-11-04 | 赫摩耐提克斯公司 | Surface mapping by optical manipulation of particles in relation to a functionalized surface |
| CN101216414A (en) * | 2007-12-29 | 2008-07-09 | 中国科学院西安光学精密机械研究所 | Multifunctional optical micro-control device |
| EP2576805A1 (en) * | 2010-05-25 | 2013-04-10 | Arryx, Inc. | Holographic fluctuation microscopy apparatus and method for determining mobility of particle and/or cell dispersions |
| CN102436063B (en) * | 2011-10-21 | 2014-04-02 | 李志扬 | Laser optical tweezer microscope |
| CN104374676B (en) * | 2014-11-25 | 2017-02-22 | 中国科学技术大学 | Particle diameter detection method based on optical trapping |
-
2018
- 2018-07-08 CN CN202011112154.1A patent/CN112198650A/en not_active Withdrawn
- 2018-07-08 CN CN202011153243.0A patent/CN112230417A/en not_active Withdrawn
- 2018-07-08 CN CN201810741210.4A patent/CN108931846B/en active Active
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| Publication number | Publication date |
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| CN108931846A (en) | 2018-12-04 |
| CN112198650A (en) | 2021-01-08 |
| CN108931846B (en) | 2020-12-04 |
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