CN113257081A - Portable multimedia teaching equipment for financial accounting teaching - Google Patents
Portable multimedia teaching equipment for financial accounting teaching Download PDFInfo
- Publication number
- CN113257081A CN113257081A CN202110509488.0A CN202110509488A CN113257081A CN 113257081 A CN113257081 A CN 113257081A CN 202110509488 A CN202110509488 A CN 202110509488A CN 113257081 A CN113257081 A CN 113257081A
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- China
- Prior art keywords
- box body
- gear
- teaching
- portable multimedia
- motor
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- 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.)
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Links
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 239000000428 dust Substances 0.000 claims abstract description 31
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B19/00—Teaching not covered by other main groups of this subclass
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- B08B1/12—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
Abstract
The invention relates to the teaching field, in particular to portable multimedia teaching equipment for financial accounting teaching, which comprises a box body, wherein a movable writing mechanism is arranged in the box body, a dust exhaust hopper is arranged at the bottom of the box body, a dust suction mechanism is arranged on the outer wall of the box body, and a telescopic adjusting mechanism is arranged at the bottom of the dust suction mechanism; the telescopic adjusting mechanism comprises: the device comprises a first connecting frame, a first rotary adjusting assembly, a height adjusting assembly and a second rotary adjusting assembly, wherein the first rotary adjusting assembly is rotatably connected with the first connecting frame; one end of the height-adjusting component is installed on the first rotary adjusting component, the second rotary adjusting component is installed on the sliding plate of the height-adjusting component, and the second rotary adjusting component is used for adjusting the stability of the telescopic adjusting mechanism. The invention can facilitate the height and angle adjustment of the supporting mechanism, not only can ensure the stability of the equipment, but also can facilitate the carrying of the equipment and better facilitate the use of the equipment.
Description
Technical Field
The invention relates to the field of teaching, in particular to portable multimedia teaching equipment for financial accounting teaching.
Background
The multimedia teaching is that in the teaching process, according to the characteristics of a teaching target and a teaching object, modern teaching media are reasonably selected and applied through teaching design, and are organically combined with the traditional teaching means to jointly participate in the whole teaching process, and various media information acts on students to form a reasonable teaching process structure so as to achieve the optimized teaching effect.
Teacher is carrying out financial accounting teaching in-process, sometimes can be outdoor the processing of imparting knowledge to students, just so need use multimedia teaching equipment, but present multimedia teaching all sets up inside the multimedia classroom, and the carrying and the use of equipment like this, inconvenience very, and then influence teacher and carry out outdoor teaching and handle, brought a great deal of inconvenience for teacher like this.
Disclosure of Invention
The invention aims to provide a portable multimedia teaching device for finance and accounting teaching, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a portable multimedia teaching device for financial accounting teaching comprises a box body, wherein mobile writing mechanisms are installed at two ends inside the box body, a plurality of dust discharging hoppers are installed at the bottom of the box body, a dust suction mechanism is installed on the outer wall of the box body, which is positioned outside the dust discharging hoppers, and a telescopic adjusting mechanism for supporting the device is installed at the bottom of the dust suction mechanism; the telescopic adjusting mechanism comprises: the first rotary adjusting assembly is rotatably connected with the first connecting frame and used for rotating the telescopic adjusting mechanism of the box body to a vertical direction to support the box body; one end of the height adjusting assembly is mounted on the first rotary adjusting assembly and used for adjusting the height of the box body; the second rotary adjusting component is installed on the sliding plate of the height-adjusting component and is used for adjusting the stability of the telescopic adjusting mechanism.
As a further scheme of the invention, a handle is fixedly arranged on the outer wall of the box body.
As a further aspect of the present invention, the mobile writing mechanism includes: the setting is at the first threaded rod at the inside both ends of box, and the first threaded rod one end at both ends is connected with first motor through the belt, the first motor outside is connected with the inner wall of box through the mounting bracket, threaded connection has the slider on the first threaded rod, and the slider of one end passes through the connecting rod to be connected with the clipboard, and the slider of other end passes through the connecting rod to be connected with the clipboard, and the clipboard sets up the both ends at the box respectively.
As a further scheme of the invention, the writing board is tightly attached to a cleaning brush, and the cleaning brush is connected with the inner wall of the box body.
As a further aspect of the present invention, a dust suction mechanism includes: the dust collecting box is arranged at two ends inside the connecting cover, the inner side wall between the dust collecting boxes is arranged to be a filter screen plate, a bidirectional telescopic rod is arranged between the filter screen plates, an exhaust pipe is arranged at the bottom of the connecting cover, and an exhaust pump is arranged on the exhaust pipe.
As a further aspect of the present invention, the first rotation adjusting assembly includes: first gear and with first gear intermeshing's first gear connection spare, first gear and first gear connection spare are connected with first connection frame through first pivot and second pivot respectively, and wherein, the second motor is installed to the one end of first pivot, and the second motor is installed on first connection frame to and the other end setting of first gear connection spare is with connecting groove.
As a further aspect of the present invention, the height-adjusting assembly includes: and the third motor is arranged in the connecting groove, a second threaded rod is arranged on a motor shaft of the third motor, a limiting block is arranged at the other end of the second threaded rod, and a sliding plate is connected to the second threaded rod in a threaded manner.
As a further aspect of the present invention, the second rotation adjustment assembly includes: the second connecting frame is fixedly installed on the sliding plate, the inside of the second connecting frame is connected with the second gear through a third rotating shaft, a fourth motor is arranged on the lower side of the third rotating shaft, and the fourth motor is arranged on the lower side of the second connecting frame.
As a further scheme of the present invention, a second gear connecting piece is engaged with the inner side of the second gear, the second gear connecting piece is connected with the second connecting frame through a fourth rotating shaft, a supporting leg is fixedly installed on the inner side of the second gear connecting piece, and a supporting block is fixedly installed on the inner side of the supporting leg.
As a further scheme of the invention, a friction pad is embedded inside the supporting block.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the movable writing mechanism is arranged in the box body, so that the direction adjustment of the movable writing mechanism can be realized, and the telescopic adjusting mechanism is arranged on the dust collection mechanism, so that the height and angle adjustment of the supporting mechanism can be facilitated, the stability of the equipment can be ensured, the equipment can be conveniently carried, and the use of the equipment is more convenient.
Drawings
FIG. 1 is a schematic structural diagram of a front view of a portable multimedia teaching apparatus for finance and accounting teaching according to the present invention.
Fig. 2 is a schematic structural diagram of a portable multimedia teaching device for finance and accounting teaching.
Fig. 3 is a schematic structural diagram of a box body in the portable multimedia teaching equipment for finance and accounting teaching of the invention.
FIG. 4 is a schematic structural diagram of a first gear connector in the portable multimedia teaching apparatus for finance and accounting teaching according to the present invention.
Fig. 5 is a schematic three-dimensional structure diagram of a sliding plate in the portable multimedia teaching device for finance and accounting teaching according to the invention.
1. A box body; 2. a handle; 3. a first threaded rod; 4. a belt; 5. a first motor; 6. a mounting frame; 7. a slider; 8. a connecting rod; 9. a writing board; 10. cleaning the brush; 11. a dust discharge hopper; 12. a dust collecting box; 13. a filter screen plate; 14. a bidirectional telescopic rod; 15. a connecting cover; 16. an exhaust pipe; 17. an air suction pump; 18. a first connection frame; 19. a second motor; 20. a first rotating shaft; 21. a first gear; 22. a first gear connection; 23. a second rotating shaft; 24. a connecting groove; 25. a third motor; 26. a second threaded rod; 27. a limiting block; 28. a sliding plate; 29. a second connection frame; 30. a third rotating shaft; 31. a second gear; 32. a fourth motor; 33. a second gear connection; 34. a fourth rotating shaft; 35. supporting legs; 36. a support block; 37. a friction pad; 38. a display screen.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-3, in the embodiment of the invention, a portable multimedia teaching device for finance and accounting teaching comprises a box body 1, wherein two ends inside the box body 1 are provided with a movable writing mechanism, the bottom of the box body 1 is provided with a plurality of dust discharging hoppers 11, the outer wall of the box body 1 positioned outside the dust discharging hoppers 11 is provided with a dust collection mechanism, and the bottom of the dust collection mechanism is provided with a telescopic adjusting mechanism for supporting the device; the telescopic adjusting mechanism comprises: the first connecting frame 18, the first rotary adjusting assembly, the height adjusting assembly and the second rotary adjusting assembly are rotatably connected with the first connecting frame 18 and used for rotating the telescopic adjusting mechanism of the box body 1 to the vertical direction to support the box body 1; one end of the height adjusting assembly is mounted on the first rotary adjusting assembly and used for adjusting the height of the box body 1; the second rotation adjusting assembly is installed on the sliding plate 28 of the height-adjusting assembly, and the second rotation adjusting assembly is used for adjusting the stability of the telescopic adjusting mechanism, the telescopic adjusting mechanism is rotated to the vertical direction through the first rotation adjusting assembly, so that the box body 1 can be used for supporting, then the height of the box body 1 can be adjusted through the improvement assembly, the telescopic adjusting mechanism is rotated to the outer side through the second rotation adjusting mechanism for adjustment, the supporting stability of the telescopic adjusting mechanism can be ensured, the telescopic adjusting mechanism can also be retracted, and the carrying and the processing of the equipment can be facilitated.
Referring to fig. 1-2, in an embodiment of the present invention, a handle 2 is fixedly mounted on an outer wall of the box body 1, so that the device can be conveniently carried, and a portable function of the device can be realized.
Referring to fig. 1-3, in one embodiment of the present invention, the mobile writing mechanism comprises: the first threaded rod 3 of setting at the inside both ends of box 1, the 3 one end at both ends of first threaded rod are connected with first motor 5 through belt 4, the first motor 5 outside is connected with the inner wall of box 1 through mounting bracket 6, threaded connection has slider 7 on the first threaded rod 3, and the slider 7 of one end is connected with clipboard 9 through connecting rod 8, and the slider 7 of the other end is connected with clipboard 9 through connecting rod 8, and clipboard 9 sets up respectively at the both ends of box 1, and it is rotatory to drive first threaded rod 3 through first motor 5, and thereby the inside of box 1 that first threaded rod 3 drove clipboard 9 shifts out the convenience equipment of the both ends of box 1 and carry out the teaching processing like this, and then make things convenient for mr's outdoor teaching processing.
Referring to fig. 1-3, in an embodiment of the present invention, the writing board 9 is tightly attached to the cleaning brush 10, the cleaning brush 10 is connected to the inner wall of the box body 1, and during the movement of the writing board 9, the cleaning brush 10 can wipe the surface of the writing board 9, so as to facilitate the cleaning of the writing board 9.
Referring to fig. 1, in an embodiment of the present invention, a display screen 38 is disposed on an outer wall of the box body 1, and can be used for multimedia teaching.
Referring to fig. 2, in one embodiment of the present invention, a dust suction mechanism includes: the dust collecting box comprises a connecting cover 15 fixedly connected with the outer wall of a box body 1, dust collecting boxes 12 are arranged at two ends inside the connecting cover 15, filter screen plates 13 are arranged on the inner side wall between the dust collecting boxes 12, two-way telescopic rods 14 are arranged between the filter screen plates 13, an exhaust pipe 16 is arranged at the bottom of the connecting cover 15, an exhaust pump 17 is arranged on the exhaust pipe 16, the connecting cover 15 is exhausted through the exhaust pump 17 and the exhaust pipe 16, so that air inside the box body 1 enters the dust collecting boxes 12 through a dust exhaust hopper 11, then is filtered through the filter screen plates 13 and then is exhausted through the exhaust pipe 16, thus the air inside the box body 1 can flow, further the inside of the box body 1 can be cleaned, the use of people is facilitated, the dust collecting boxes 12 are driven to synchronously move towards the outer side through the two-way telescopic rods 14, and the outer ends of the dust collecting boxes 12 can move out of the connecting cover 15, therefore, the cleaning of impurities can be facilitated, and the use of equipment is facilitated.
Referring to fig. 1-5, in one embodiment of the present invention, the first rotary adjustment assembly includes: first gear 21 and with first gear 21 intermeshing's first gear connection piece 22, first gear 21 and first gear connection piece 22 are connected with first connection frame 18 through first pivot 20 and second pivot 23 respectively, wherein, second motor 19 is installed to the one end of first pivot 20, second motor 19 is installed on first connection frame 18, and the other end of first gear connection piece 23 sets up and uses connecting groove 24, drive first pivot 20 through second motor 19 and rotate, first pivot 20 drives first gear 21 and rotates, because intermeshing between first gear 21 and the first gear connection piece 22, can drive first gear connection piece 22 and rotate like this, can be with first gear connection piece 22 pivoted vertical direction like this, thereby realize scalable adjustment mechanism and support and handle.
Referring to fig. 1-5, in one embodiment of the present invention, the height-adjustment assembly comprises: install the third motor 25 in connecting groove 24 inside, install second threaded rod 26 on the motor shaft of third motor 25, stopper 27 is installed to the other end of second threaded rod 26, and threaded connection has a sliding plate 28 on the second threaded rod 26, and is rotatory through third motor 25 drive second threaded rod 26, and second threaded rod 26 drives sliding plate 28 and removes, can realize like this that the strutting arrangement of equipment increases the processing.
Referring to fig. 1-5, in one embodiment of the present invention, the second rotary adjustment assembly includes: and a second connecting frame 29 fixedly installed on the sliding plate 28, wherein the second connecting frame 29 is internally connected with a second gear 31 through a third rotating shaft 30, a fourth motor 32 is arranged at the lower side of the third rotating shaft 30, and the fourth motor 32 is arranged at the lower side of the second connecting frame 29 and is used for driving the second gear 32 to rotate.
Referring to fig. 1 to 5, in an embodiment of the present invention, a second gear connecting member 33 is engaged with an inner side of the second gear 31, the second gear connecting member 33 is connected to the second connecting frame 29 through a fourth rotating shaft 34, a supporting leg 35 is fixedly installed on an inner side of the second gear connecting member 33, a supporting block 36 is fixedly installed on an inner side of the supporting leg 35, the third rotating shaft 30 is driven to rotate by a fourth motor 32, the third rotating shaft 30 drives the second gear connecting member 33 to rotate outward, and thus an inclination angle of the supporting leg 35 and the supporting block 36 can be effectively adjusted, so that stable support of the device can be ensured, thereby facilitating use of people.
Referring to fig. 5, in an embodiment of the present invention, the friction pad 37 is embedded inside the supporting block 36 to increase the friction between the supporting block and the ground, so as to ensure the stability of the device.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more, and it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected", and "connected" are to be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes 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.
Claims (10)
1. A portable multimedia teaching device for financial accounting teaching comprises a box body, wherein a movable writing mechanism is arranged at two ends in the box body, a plurality of dust discharging hoppers are arranged at the bottom of the box body, and a dust suction mechanism is arranged on the outer wall of the box body positioned at the outer side of the dust discharging hoppers;
the telescopic adjusting mechanism comprises: the first rotary adjusting assembly is rotatably connected with the first connecting frame and used for rotating the telescopic adjusting mechanism of the box body to a vertical direction to support the box body; one end of the height adjusting assembly is mounted on the first rotary adjusting assembly and used for adjusting the height of the box body; the second rotary adjusting component is installed on the sliding plate of the height-adjusting component and is used for adjusting the stability of the telescopic adjusting mechanism.
2. The portable multimedia teaching device for finance and accounting teaching as claimed in claim 1, wherein a handle is fixedly installed on the outer wall of the box body.
3. A portable multimedia teaching apparatus for financial accounting teaching as claimed in claim 2 wherein said mobile writing mechanism comprises: the setting is at the first threaded rod at the inside both ends of box, and the first threaded rod one end at both ends is connected with first motor through the belt, the first motor outside is connected with the inner wall of box through the mounting bracket, threaded connection has the slider on the first threaded rod, and the slider of one end passes through the connecting rod to be connected with the clipboard, and the slider of other end passes through the connecting rod to be connected with the clipboard, and the clipboard sets up the both ends at the box respectively.
4. The portable multimedia teaching apparatus for finance and accounting teaching as claimed in claim 3, wherein the writing board is tightly attached with a cleaning brush, and the cleaning brush is connected with the inner wall of the box body.
5. A portable multimedia teaching apparatus for financial accounting teaching as claimed in claim 1 wherein the dust suction mechanism comprises: the dust collecting box is arranged at two ends inside the connecting cover, the inner side wall between the dust collecting boxes is arranged to be a filter screen plate, a bidirectional telescopic rod is arranged between the filter screen plates, an exhaust pipe is arranged at the bottom of the connecting cover, and an exhaust pump is arranged on the exhaust pipe.
6. A portable multimedia teaching apparatus for financial accounting teaching as claimed in claim 1 wherein said first rotary adjustment assembly comprises: first gear and with first gear intermeshing's first gear connection spare, first gear and first gear connection spare are connected with first connection frame through first pivot and second pivot respectively, and wherein, the second motor is installed to the one end of first pivot, and the second motor is installed on first connection frame to and the other end setting of first gear connection spare is with connecting groove.
7. The portable multimedia teaching device for financial accounting teaching of claim 6 wherein the height adjustment assembly comprises: and the third motor is arranged in the connecting groove, a second threaded rod is arranged on a motor shaft of the third motor, a limiting block is arranged at the other end of the second threaded rod, and a sliding plate is connected to the second threaded rod in a threaded manner.
8. A portable multimedia teaching apparatus for financial accounting teaching as claimed in claim 7 wherein said second rotary adjustment assembly comprises: the second connecting frame is fixedly installed on the sliding plate, the inside of the second connecting frame is connected with the second gear through a third rotating shaft, a fourth motor is arranged on the lower side of the third rotating shaft, and the fourth motor is arranged on the lower side of the second connecting frame.
9. The portable multimedia teaching device for finance and accounting teaching of claim 8, wherein a second gear connecting piece is meshed with the inner side of the second gear, the second gear connecting piece is connected with the second connecting frame through a fourth rotating shaft, a supporting leg is fixedly installed on the inner side of the second gear connecting piece, and a supporting block is fixedly installed on the inner side of the supporting leg.
10. The portable multimedia teaching apparatus for finance and accounting teaching of claim 9 wherein the inside of the supporting block is inlaid with a friction pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110509488.0A CN113257081A (en) | 2021-05-11 | 2021-05-11 | Portable multimedia teaching equipment for financial accounting teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110509488.0A CN113257081A (en) | 2021-05-11 | 2021-05-11 | Portable multimedia teaching equipment for financial accounting teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113257081A true CN113257081A (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110509488.0A Pending CN113257081A (en) | 2021-05-11 | 2021-05-11 | Portable multimedia teaching equipment for financial accounting teaching |
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| Country | Link |
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| CN (1) | CN113257081A (en) |
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| US20130054255A1 (en) * | 2011-08-26 | 2013-02-28 | Elwha LLC, a limited liability company of the State of Delaware | Controlled substance authorization and method for ingestible product preparation system and method |
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| CN211877920U (en) * | 2020-01-20 | 2020-11-06 | 浙江易承环境科研有限公司 | Toxic gas detector |
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| CN212213037U (en) * | 2020-03-25 | 2020-12-25 | 杨高盛 | Open-air geological exploration draft holder of stable form |
| CN212345067U (en) * | 2020-06-08 | 2021-01-15 | 李会杰 | Vegetable greenhouse insecticidal device for agricultural production |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059928A (en) * | 2007-05-29 | 2007-10-24 | 吴淼东 | Portable advertisement plate |
| US20130054255A1 (en) * | 2011-08-26 | 2013-02-28 | Elwha LLC, a limited liability company of the State of Delaware | Controlled substance authorization and method for ingestible product preparation system and method |
| CN108312740A (en) * | 2018-01-22 | 2018-07-24 | 佛山杰致信息科技有限公司 | A kind of teaching intelligent blackboard |
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| CN210466780U (en) * | 2019-09-12 | 2020-05-05 | 江西科技学院 | Display device for news teaching |
| CN211138789U (en) * | 2019-12-10 | 2020-07-31 | 郭彦魁 | Chinese language and literature teaching board |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210813 |