CN114110253B - Microfluidic chip valve for controlling on-off of fluid - Google Patents
Microfluidic chip valve for controlling on-off of fluid Download PDFInfo
- Publication number
- CN114110253B CN114110253B CN202111453638.7A CN202111453638A CN114110253B CN 114110253 B CN114110253 B CN 114110253B CN 202111453638 A CN202111453638 A CN 202111453638A CN 114110253 B CN114110253 B CN 114110253B
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- valve
- bottom plate
- microfluidic chip
- membrane
- controlling
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- 239000012530 fluid Substances 0.000 title claims abstract description 36
- 239000012528 membrane Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 4
- 230000001070 adhesive effect Effects 0.000 claims 4
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000002313 adhesive film Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 7
- 230000006978 adaptation Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 26
- 230000000903 blocking effect Effects 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 108010025899 gelatin film Proteins 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- WUJISAYEUPRJOG-UHFFFAOYSA-N molybdenum vanadium Chemical compound [V].[Mo] WUJISAYEUPRJOG-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K99/0001—Microvalves
- F16K99/0003—Constructional types of microvalves; Details of the cutting-off member
- F16K99/0015—Diaphragm or membrane valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K99/0001—Microvalves
- F16K99/0034—Operating means specially adapted for microvalves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K2099/0073—Fabrication methods specifically adapted for microvalves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K2099/0082—Microvalves adapted for a particular use
- F16K2099/0084—Chemistry or biology, e.g. "lab-on-a-chip" technology
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a microfluidic chip valve for controlling on-off of fluid. The microfluidic chip valve for controlling fluid on-off comprises: the device comprises an upper cover, an elastic die, an adhesive film and a bottom plate, wherein the adhesive film is adhered and fixed on the bottom plate, the elastic die is adhered and fixed on the adhesive film, and the upper cover is fixedly connected with the bottom plate through threads. A positioning hole is formed in the axle center of the upper cover, and threads are arranged in the positioning hole; the axis of the viscous film is provided with a through hole, and the axis of the bottom plate is provided with a valve cavity. The plugging process of the valve cavity is controlled by controlling the moving distance of the elastic membrane to the valve cavity direction, so that the flow of fluid at the valve cavity is accurately controlled. The microfluidic chip valve for controlling the on-off of the fluid is simple in structure, the mode of controlling the valve to be closed is convenient to operate, the valve is not connected with air like an air valve, and the microfluidic chip valve can be matched with any chip as an independent module, so that the technical effect of improving the adaptation range of the valve is achieved.
Description
Technical Field
The invention relates to the field of valves, in particular to a microfluidic chip valve for controlling on-off of fluid.
Background
The principle of the currently used hydraulic control valve is basically the same, an electromagnetic pilot valve is used, and the valve is controlled to be opened and closed by utilizing the pressure difference of fluid. The valve is not provided with a position detection device, and the position of the valve cannot be judged, so that the valve has single action and can be used as a switching valve generally.
Valves for fluid control systems range from the simplest shut-off valves to the various valves used in extremely complex automatic control systems, which are quite diverse in variety and specification. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The valves are also classified into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, dual phase steel valves, plastic valves, nonstandard custom valves, etc. according to the materials.
In life, the valve is often used for regulating the water flow, but the valve in the prior art has the technical problems of complex structure, complex operation and low suitability.
Disclosure of Invention
In view of the above, the invention mainly provides a microfluidic chip valve for controlling fluid on-off, which has the advantages of simple structure, convenient operation and wide adaptation range.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the microfluidic chip valve for controlling fluid on-off comprises: the device comprises an upper cover, an elastic die, an adhesive film and a bottom plate, wherein the adhesive film is adhered and fixed on the bottom plate, the elastic die is adhered and fixed on the adhesive film, and the upper cover is fixedly connected with the bottom plate through threads;
a positioning hole is formed in the axle center of the upper cover, and threads are arranged in the positioning hole;
The axis of the viscous film is provided with a through hole, and the axis of the bottom plate is provided with a valve cavity.
In one embodiment, the two sides of the positioning hole of the upper cover are symmetrically provided with a liquid inlet channel and a liquid outlet channel, the viscous film is symmetrically provided with a runner hole, and the bottom plate is symmetrically provided with a buffer groove.
In one embodiment, a flow passage is further arranged on the bottom plate, and the flow passage is communicated with the buffer groove and the valve cavity.
In one embodiment, the runner hole and the buffer groove are on the same vertical line with the liquid inlet channel and the liquid outlet channel.
In one embodiment, the microfluidic chip valve for controlling fluid on-off further comprises: the pressure bar is a threaded rod and is in threaded connection with the positioning hole;
in one embodiment, the bottom of the compression bar is a hemispherical structure.
In one embodiment, the valve cavity depth is about 1/2 of the bottom plate thickness, and the valve cavity cross-sectional shape is one of circular, rectangular, polygonal or irregular.
In one embodiment, the elastic film is one of a silica gel film, a plastic film, a rubber film or a PDMS film, and the thickness is 0.1mm-0.5mm.
In one embodiment, the elastic film and the adhesive film are bonded by glue, wherein the glue is one of UV glue, thermosetting glue, or room temperature curing glue.
The microfluidic chip valve for controlling the on-off of the fluid has the following beneficial effects:
The microfluidic chip valve for controlling fluid on-off comprises: the device comprises an upper cover, an elastic die, an adhesive film and a bottom plate, wherein the adhesive film is adhered and fixed on the bottom plate, the elastic die is adhered and fixed on the adhesive film, and the upper cover is fixedly connected with the bottom plate through threads. A positioning hole is formed in the axle center of the upper cover, and threads are arranged in the positioning hole; the axis of the viscous film is provided with a through hole, and the axis of the bottom plate is provided with a valve cavity.
The plugging process of the valve cavity is controlled by controlling the moving distance of the elastic membrane to the valve cavity direction, so that the flow of fluid at the valve cavity is accurately controlled. The microfluidic chip valve for controlling the on-off of the fluid is simple in structure, convenient to operate in a mode of controlling the valve to be closed, free of gas connection like a gas valve, capable of being matched with any chip as an independent module, and wide in adaptation range.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a microfluidic chip valve for controlling fluid on-off according to the present invention;
FIG. 2 is a front view of a microfluidic chip valve for controlling fluid on-off in accordance with the present invention;
FIG. 3 is a cross-sectional view of a microfluidic chip valve for controlling fluid on-off in accordance with the present invention in front view;
FIG. 4 is a left side view of a microfluidic chip valve for controlling fluid on-off according to the present invention when opened;
FIG. 5 is a cross-sectional view of a microfluidic chip valve for controlling fluid on-off in accordance with the present invention from the left side;
fig. 6 is a cross-sectional view of a microfluidic chip valve for controlling fluid on-off according to the present invention in a left side view when closed.
[ Main reference numerals Specification ]
1. An upper cover; 2. an elastic film; 3. an adhesive film; 4. a bottom plate; 5. a valve cavity; 6. a liquid inlet channel; 7. a liquid outlet channel; 8. and (5) pressing the rod.
Detailed Description
The microfluidic chip valve for controlling fluid on-off according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments of the present invention.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 4, the microfluidic chip valve for controlling fluid on-off includes: the upper cover 1, the elastic die 2, the adhesive film 3 and the bottom plate 4 are used for adhering and fixing the adhesive film 3 on the bottom plate 4, the elastic die 2 is adhered and fixed on the adhesive film 3, and the upper cover 1 is fixedly connected with the bottom plate 4 through threads. A positioning hole is formed in the axle center of the upper cover 1, and threads are arranged in the positioning hole; a through hole is arranged at the axis of the adhesive film 3, and a valve cavity 5 is arranged at the axis of the bottom plate 4. By controlling the moving distance of the elastic membrane 2 to the valve cavity 5, the plugging process of the valve cavity 5 is controlled, and the flow of fluid at the valve cavity 5 is accurately controlled. The microfluidic chip valve for controlling the on-off of the fluid is simple in structure, convenient to operate in a mode of controlling the valve to be closed, free of gas connection like a gas valve, capable of being matched with any chip as an independent module, and wide in adaptation range.
In order to enable liquid to pass through the valve cavity 5, liquid inlet channels 6 and liquid outlet channels 7 are symmetrically arranged on two sides of the positioning holes of the upper cover 1, flow channel holes are symmetrically arranged on the viscous film 3, buffer grooves are symmetrically arranged on the bottom plate 4, impact of flowing liquid on the bottom plate 4 can be reduced due to the arrangement of the buffer grooves, and the service life of the valve is prolonged.
Further, a flow passage is further arranged on the bottom plate 4 and is communicated with the buffer groove and the valve cavity 5. When the microfluidic chip valve for controlling the on-off of fluid is opened, liquid flows into the valve from the liquid inlet channel 6, then enters the valve cavity 5 through the flow channel hole on the viscous film 3, the buffer groove on the bottom plate 4 and the flow channel, and at the moment, the elastic film 2 does not block the valve cavity 5, so that the liquid in the valve cavity 5 flows out through the flow channel, the flow channel hole on the viscous film 3 and the liquid outlet channel 7.
When the valve of the microfluidic chip for controlling the on-off of the fluid is closed, the liquid flows into the valve from the liquid inlet channel 6, and then enters the valve cavity 5 through the flow channel hole on the viscous film 3, the buffer groove on the bottom plate 4 and the flow channel, and the valve cavity 5 is blocked by the elastic film 2, so that the liquid blocking is completed.
In order not to influence the flow rate of the liquid in the valve, the runner hole and the buffer groove are on the same vertical line with the liquid inlet channel 6 and the liquid outlet channel 7.
In order to control the moving distance of the elastic membrane to the valve cavity direction conveniently, the microfluidic chip valve for controlling the on-off of fluid further comprises: the pressure lever 8, pressure lever 8 are the threaded rod, pressure lever 8 and locating hole threaded connection. By controlling the moving distance of the pressing rod 8, the progress of the elastic membrane 2 for blocking the valve cavity 5 can be accurately controlled.
In order to improve the service life of the elastic membrane 2, the bottom of the compression bar 8 is of a hemispherical structure, and the hemispherical structure has no sharp surface, so that the elastic membrane 2 can be prevented from being punctured, and the stability and the service life of the valve are improved.
In order to improve the blocking effect of the valve cavity 5, the depth of the valve cavity 5 is about 1/2 of the thickness of the bottom plate, and the cross section of the valve cavity 5 is one of round, rectangular, polygonal or irregular patterns. In one embodiment, the valve chamber 5 is circular in cross-section.
In order to further improve the service life of the elastic membrane 2 while ensuring the sealing effect on the valve cavity 5, the elastic membrane 2 is one of a silica gel membrane, a plastic membrane, a rubber membrane or a PDMS membrane, and the thickness is 0.1mm-0.5mm.
In order to improve the adhesion effect of the elastic film 2 and the adhesive film 3, the elastic film 2 and the adhesive film 3 are adhered by glue, wherein the glue is one of UV glue, thermosetting glue or room temperature curing glue.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (6)
1. A microfluidic chip valve for controlling the on-off of a fluid, comprising: the device comprises an upper cover (1), an elastic membrane (2), an adhesive membrane (3) and a bottom plate (4), wherein the adhesive membrane (3) is stuck and fixed on the bottom plate (4), the elastic membrane (2) is stuck and fixed on the adhesive membrane (3), and the upper cover (1) is fixedly connected with the bottom plate (4) through threads;
A positioning hole is formed in the axis of the upper cover (1), and threads are formed in the positioning hole;
the axis of the viscous film (3) is provided with a through hole, and the axis of the bottom plate (4) is provided with a valve cavity (5);
The two sides of the positioning hole of the upper cover (1) are symmetrically provided with a liquid inlet channel (6) and a liquid outlet channel (7), the viscous film (3) is symmetrically provided with a runner hole, and the bottom plate (4) is symmetrically provided with a buffer groove;
a flow passage is further arranged on the bottom plate (4) and is communicated with the buffer groove and the valve cavity (5);
further comprises: the compression bar (8), compression bar (8) are the threaded rod, compression bar (8) with locating hole threaded connection.
2. The microfluidic chip valve for controlling fluid on-off according to claim 1, wherein the runner hole, the buffer groove, the liquid inlet channel (6) and the liquid outlet channel (7) are on the same vertical line.
3. The microfluidic chip valve for controlling fluid on-off according to claim 1, wherein the bottom of the pressure rod (8) is of a hemispherical structure.
4. The microfluidic chip valve for controlling fluid on-off according to claim 1, wherein the depth of the valve cavity (5) is about 1/2 of the thickness of the bottom plate (4), and the cross-sectional shape of the valve cavity (5) is one of a circle, a rectangle, a polygon or an irregular pattern.
5. The microfluidic chip valve for controlling fluid on-off according to claim 1, wherein the elastic membrane (2) is one of a silicone membrane, a plastic membrane, a rubber membrane or a PDMS membrane, and has a thickness of 0.1mm-0.5mm.
6. The microfluidic chip valve for controlling fluid on-off according to claim 1, wherein the elastic membrane (2) and the adhesive membrane (3) are bonded by glue, and the glue is one of UV glue, thermosetting glue or room temperature curing glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453638.7A CN114110253B (en) | 2021-12-01 | 2021-12-01 | Microfluidic chip valve for controlling on-off of fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453638.7A CN114110253B (en) | 2021-12-01 | 2021-12-01 | Microfluidic chip valve for controlling on-off of fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114110253A CN114110253A (en) | 2022-03-01 |
| CN114110253B true CN114110253B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111453638.7A Active CN114110253B (en) | 2021-12-01 | 2021-12-01 | Microfluidic chip valve for controlling on-off of fluid |
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| Country | Link |
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| CN (1) | CN114110253B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102812276A (en) * | 2009-12-31 | 2012-12-05 | 通用电气公司 | Microvalve |
| CN106902904A (en) * | 2017-04-01 | 2017-06-30 | 苏州岚轩生物科技有限公司 | For the liquid control valve door gear and its micro-fluidic chip of micro-fluidic chip |
| CN206592627U (en) * | 2017-04-06 | 2017-10-27 | 融智生物科技（青岛）有限公司 | A kind of electromagnetic micro valve for being integrated in micro-fluidic chip |
| CN107573704A (en) * | 2017-09-27 | 2018-01-12 | 北京工业大学 | A kind of phase transformation micro-valve based on conducing composite material and sensing thermal drivers |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7186383B2 (en) * | 2002-09-27 | 2007-03-06 | Ast Management Inc. | Miniaturized fluid delivery and analysis system |
| WO2012091677A1 (en) * | 2010-12-30 | 2012-07-05 | Agency For Science, Technology And Research | Microfluidic valve module and system for implementation |
-
2021
- 2021-12-01 CN CN202111453638.7A patent/CN114110253B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102812276A (en) * | 2009-12-31 | 2012-12-05 | 通用电气公司 | Microvalve |
| CN106902904A (en) * | 2017-04-01 | 2017-06-30 | 苏州岚轩生物科技有限公司 | For the liquid control valve door gear and its micro-fluidic chip of micro-fluidic chip |
| CN206592627U (en) * | 2017-04-06 | 2017-10-27 | 融智生物科技（青岛）有限公司 | A kind of electromagnetic micro valve for being integrated in micro-fluidic chip |
| CN107573704A (en) * | 2017-09-27 | 2018-01-12 | 北京工业大学 | A kind of phase transformation micro-valve based on conducing composite material and sensing thermal drivers |
Non-Patent Citations (1)
| Title |
|---|
| 一种PDMS薄膜型微阀的制备与性能分析;崔海航, 李战华, 靳刚;微细加工技术;20040930(第03期);第70-75页 * |
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| Publication number | Publication date |
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| CN114110253A (en) | 2022-03-01 |
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