CN104464490B - Teaching aid for machinery course teaching - Google Patents
Teaching aid for machinery course teaching Download PDFInfo
- Publication number
- CN104464490B CN104464490B CN201410755493.XA CN201410755493A CN104464490B CN 104464490 B CN104464490 B CN 104464490B CN 201410755493 A CN201410755493 A CN 201410755493A CN 104464490 B CN104464490 B CN 104464490B
- Authority
- CN
- China
- Prior art keywords
- teaching
- mechanical
- teaching aid
- plates
- base plate
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
Abstract
The invention discloses a teaching aid for machinery course teaching. The teaching aid for machinery course teaching comprises a power source, a mechanism demonstration unit and a bottom plate. The mechanism demonstration unit comprises an installation plate and mechanical parts, wherein the mechanical parts carry various mechanical mechanisms and are distributed on the installation plate. The power source is arranged on the bottom plate and provides power to the mechanical mechanisms. The teaching aid for machinery course teaching is low in cost, portable, and easy to dismount and mount. All transmission mechanisms are integrated and installed stereoscopically, and all the mechanical mechanisms are not limited on one plane and operate alternatively. The mechanical structure is obviously known and can be taught by a teacher conveniently, and therefore study monotonicity for students of engineering is avoided, study fun is improved, abstraction of engineering theory study is broken through, visibility and maneuverability are improved, and the students can integrate theory study and practical operation, more visually observe the structure and operation mode of machines, and improve study quality.
Description
Technical field
The present invention relates to a kind of teaching aid, more particularly to a kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering.
Background technology
In terms of current teaching, China educates concern total marks of the examination simply and have ignored the understanding of students and start
Ability, lacks the teaching appliance of actual presentation in teaching process, lacks teaching aid and allows teaching to become dull language description.
Teaching aid is the material object for the purpose of propagating science and technology, education people, is completely sci-tech mass media, is teenager's scientific and technological activities
In indispensable equipment.Teaching aid in scientific and technological activities has object visual and duplicate teaching aid.Current junior middle school, senior middle school, university
The teaching aid of these three important educational stages extremely lacks, and senior middle school, junior middle school, the university of Most students do not use religion on classroom
Tool.Theory of mechanics, Machine Design for Techniques for Machinery Students, covers number of types of basic mechanical realization, they
The motion in various paths can be realized.Have simple in these mechanisms, also there is complexity, and on classroom, these mechanisms are difficult
A ratio is formed in the brain of student more complete in kind vivid.The motion path and principle of mechanism is in the brain of student
Seem fuzzy, it is unintelligible.
Accordingly, it would be desirable to a kind of integrated mechanical teaching aid, for carrying out visual illustration on classroom, by the group of basic mechanical mechanism
Into, combination, forms of motion visual pattern show, student is got information about when mechanical principle course is learnt
The characteristics of motion of mechanism, the movement relation of each component, deepens the understanding to machinery in energy fast understanding mechanism.
The content of the invention
It is an object of the invention to provide a kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering, can be used in carrying out material object on classroom
Demonstration, the composition of basic mechanical mechanism, combination, forms of motion visual pattern are showed, and make student in learning machine
The characteristics of motion of mechanism can be got information about during tool principle course, the movement relation of each component, deepens in energy fast understanding mechanism
Understanding to machinery.
The technical scheme is that：A kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering, including power source, mechanism's demonstration list
Unit and base plate, mechanism's demonstration unit includes installing plate and machine components, and the machine components build various mechanical mechanisms point
On the installing plate, the power source is arranged on base plate cloth, and the power source provides power for the mechanical mechanism.
Preferably, mechanism's demonstration unit is four, and mechanism's demonstration unit is distributed in base surrounding, mechanism's demonstration
Unit includes multiple mechanical mechanisms.
Preferably, base plate also includes intermediate studdle tower, and the installing plate of mechanism's demonstration unit rotates with base plate connect respectively
Connect, the bottom of the intermediate studdle tower is provided with two reducing motors, and reducing motor is connected respectively by rope with four installing plates.
Preferably, two control panels and an air accumulator, one group of magnetic valve, for controlling whole religion are set on the base plate
The air path part of tool.
Preferably, the mechanical mechanism is specially planar linkage mechanism, cam mechanism, intermittent motion mechanism, V belt translation machine
Structure, chain-drive mechanism, gear drive, worm gearing, lead-screw drive mechanism, shaft coupling, clutch and brake base
This part.
Preferably, the installing plate is respectively A plates, B plates, C plates and D plates.
Beneficial effects of the present invention：The teaching aid cost of the present invention is relatively low, beneficial to carrying, easily dismounting etc., and all of transmission
Mechanism is integrated in one, and solid is installed, and mechanical mechanism is no longer limited to a plane, and crossing operation is very clear to frame for movement,
It is easy to teacher to explain, so as to break the uninteresting property of Engineering Students study, improves interesting, further improve the quality of teaching, breaks
The abstractness of industry science theory study, strengthens intuitive and operability, makes student that theory study and practical operation to combine together,
The structure and function mode of such machinery are more intuitively observed, learning quality is improved.
Description of the drawings
Fig. 1 is the structural representation of the teaching aid for being used for Teaching of Courses Concerning Mechanical Engineering in the present invention；
In figure：1 base plate, 2 intermediate studdle towers, 3 A plates, 4 B plates, 5 C plates, 6 D plates, 7 single-chip microcomputers, 8 air accumulators, 9 slow down
Motor, 10 reducing motors I, 11 ratchet mechanisms, 12 space gear trains, 13 epicyclic trains, 14 indexing mechanisms, 15 cam mechanisms,
16 differential mechanisms, 17 linkages, 18 reducing motors II, 19 lathes, 20 motors, 21 reducing motors III, 22 reducing motors IV, 23 gas
Dynamic mechanical arm, 24 cylinders, 25 internal combustion engines.
Specific embodiment
The embodiment that the present invention is provided is described in further detail with reference to accompanying drawing：
As shown in figure 1, a kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering, including power source, mechanism's demonstration unit and base plate
1, mechanism's demonstration unit includes installing plate and machine components, the machine components build various mechanical mechanisms be distributed in it is described
On installing plate, the power source is arranged on base plate 1, and the power source provides power for the mechanical mechanism.
Wherein, mechanism's demonstration unit is four, and mechanism's demonstration unit is distributed in the surrounding of base 1, mechanism's demonstration
Unit includes multiple mechanical mechanisms.
Preferably, base plate 1 also includes intermediate studdle tower 2, and the installing plate of mechanism's demonstration unit is rotated respectively with base plate 1
Connection, the bottom of the intermediate studdle tower 2 is provided with two reducing motors 9, and reducing motor 9 is respectively by rope and four installing plates
Connection.
Preferably, two control panels and an air accumulator 8 are set on the base plate 1, and one group of magnetic valve is whole for controlling
The air path part of teaching aid, control panel is single-chip microcomputer 7.
Preferably, the mechanical mechanism is specially planar linkage mechanism, cam mechanism, intermittent motion mechanism, V belt translation machine
Structure, chain-drive mechanism, gear drive, worm gearing, lead-screw drive mechanism, shaft coupling, clutch and brake base
This part.
Preferably, the installing plate is respectively A plates 3, B plates 4, C plates 5 and D plates 6.
The teaching aid of the present invention is a body structure, and four mechanism's demonstration units rotate with four sides of base plate be connected respectively,
Rope is pulled to realize the opening of casing and close by two reducing motors of the bottom of intermediate studdle tower.
Wherein, A plates：Power source is done by a reducing motor I 10, reducing motor I 10 connects single-chip microcomputer 9, transmitted by gear
To space gear train 12, space gear train 12 separates two power, and by Chain conveyer, one is passed to epicyclic train 13, then passed to
Indexing mechanism 14, another power passes to cam mechanism 15 by Chain conveyer, and the one side of cam mechanism 15 passes to difference by gear
Fast device 16, on the other hand passes to ratchet mechanism 11 by linkage 17.
B plates：Power source is done by a reducing motor II 18, reducing motor II 18 connects single-chip microcomputer 9, directly passes to change by axle
Fast case, by transmission main shaft automatic takeup is passed to, and is passing to space gear train 12.There is a single lathe in outside
19, lathe is driven by single motor 20.
C plates：Power source is done by two reducing motors III 21, reducing motor III 21 connects single-chip microcomputer 9, reducing motor III 21
Back and forth movement back and forth is done on tooth bar, to belt wheel, belt wheel passes through gear for gear and gear engagement transmission power when moving to left end
Tooth bar is passed to, automatically-controlled door back and forth movement is made；Gear and chain are engaged when moving to right-hand member, and chain is on automatic takeup.
D plates：Power source is done by three independent reducing motors IV 22, wherein reducing motor IV 22 connects respectively single-chip microcomputer 9,
The reducing motor IV 22 drives pneumatic mechanical manipulator 23 by gear, and mechanical arm 23 drives by cylinder 24, compressor reducer and mechanical arm 23
Routing motion.Another reducing motor IV 22 drives compressor by V belt translation.3rd reducing motor IV 22 passes through gear
Driving internal combustion engine 25.
（1）Screw-nut body
Screw-nut body is also known as screw-drive mechanism.It is mainly used to be transformed to rotary motion to move along a straight line or by directly
Line motion transform is rotary motion.Have to transmit (such as fly press, jack) based on energy；Also have to transmit motion
Based on such as the feed screw of platen)；Also adjust screw-drive mechanism for asking relative position of part etc..Leading screw spiral shell
Parent agency have slip friction mechanisms and rolling friction mechanism point.Mechanism of Sliding Leadscrew Nut simple structure, easy to process, manufacture
Low cost, with auto-lock function, but its frictional resistance moment is big, transmission efficiency low (30%～40%).Ball-screw nut mechanism
Although complex structure, manufacturing cost are high, it is impossible to self-locking, its great advantage is that frictional resistance moment is little, transmission efficiency (92%～
98%), high precision, system stiffness is good, and motion has invertibity, long service life, therefore obtains in electro-mechanical system
A large amount of extensively applications.
（2）Worm-and-wheel gear
Worm-and-wheel gear, can be applicable to the slip of suggestion lathe, and worm-drive is the two between centers transmission in spatial intersecting
Motion and a kind of transmission of power, the angle between two axial lines can be arbitrary value, conventional for 90 °.Worm-drive is used for staggeredly
Between centers transmission motion and power.
（3）Cam mechanism
Cam mechanism, belongs to roller follower, is widely used, and cam mechanism is by cam, three bases of driven member and frame
The higher pair mechanism of this component composition.Cam is a component with curved profile or groove, generally driving link, makees constant speed and returns
Transhipment is moved or linear reciprocating motion.Cam mechanism being essentially characterized by the application can make driven member obtain more complicated motion
Rule.Because the characteristics of motion of driven member depends on cam profile curve, as long as in use, according to the motion of driven member
Rule come design the contour curve of cam just can be with.
（4）Single-deck slip clutch
Single-deck slip clutch, is used for transmitting the less light-duty machinery of torque, and friction clutch is to apply most wide
It is also a history class clutch at most, it is substantially by active part, secondary part, hold-down mechanism and operating mechanism four
Packet is put into.Driving and driven part and hold-down mechanism are to ensure that clutch is in the basic structure of engagement state and energy transfer motion power,
And the operating mechanism of clutch mainly makes the device of clutch separation.
（5）Fixed shaft gear train mechanism
Space dead axle built-up gear system, for the transmission of power, slow down with it is covert.It is larger in order to obtain in plant equipment
Gearratio, or speed change and steering be often required to be driven using multipair gear, such as lathe, and the gearbox used on automobile is poor
Fast device；Widely used gear reduction unit etc. in engineering.
（6）Tape handler
A kind of machine driving that V belt translation is moved using the flexible-belt being stretched on belt wheel or power is transmitted.According to biography
The difference of dynamic principle, there is the Friction Type Belt Drive by the frictional force transmission between band and belt wheel, also has by the tooth phase on band and belt wheel
The toothed belt transmission of mutual engaged transmission.
（7）Pinion and rack
Tooth bar also divides spur rack and diagonal-cut rack, uses with straight spur gear and helical gears pairing respectively；
The flank profil of tooth bar non-involute for straight line（It is then plane for the flank of tooth）, it is infinitely great Cylinder Gear equivalent to reference radius
Wheel.
（8）Step type speed changer
Step type speed changer is using most wide one kind.It adopts gear drive, with several definite value gearratios.By institute
It is different with train pattern, there are axis fixed speed changer (conventional transmission device) and axis rotary speed gear (planetary gear speed-changing
Device) two kinds.Car and the light, gearratio of medium truck speed changer generally have 3-5 drive shift and a reverse gear, in heavy goods vehicle
In combinatory transmission, then there are more gears.So-called speed changer gear number refers to its drive shift digit.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that still can make
Various modifications and alterations are without departing from the spirit and scope of the present invention.Therefore, specification and drawings are considered as illustrative
And it is nonrestrictive.
Claims (4)
1. a kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering, it is characterised in that including power source, mechanism's demonstration unit and base plate,
Mechanism's demonstration unit includes installing plate and machine components, and the machine components build various mechanical mechanisms and are distributed in the peace
On dress plate, the power source is arranged on base plate, and the power source provides power for the mechanical mechanism, and mechanism's demonstration is single
Unit is four, and mechanism's demonstration unit is distributed in base surrounding, and mechanism's demonstration unit includes multiple mechanical mechanisms, and base plate is also
Including intermediate studdle tower, the installing plate of mechanism's demonstration unit rotates with base plate be connected respectively, the bottom of the intermediate studdle tower
Portion is provided with two reducing motors, and reducing motor is connected respectively by rope with four installing plates.
2. the teaching aid for Teaching of Courses Concerning Mechanical Engineering according to claim 1, it is characterised in that arrange two on the base plate
Individual control panel and an air accumulator, one group of magnetic valve, for controlling the air path part of whole teaching aid.
3. the teaching aid for Teaching of Courses Concerning Mechanical Engineering according to claim 1 and 2, it is characterised in that the mechanical mechanism
Specially planar linkage mechanism, cam mechanism, intermittent motion mechanism, tape handler, chain-drive mechanism, gear drive,
Worm gearing, lead-screw drive mechanism, shaft coupling, clutch and brake basic part.
4. the teaching aid for Teaching of Courses Concerning Mechanical Engineering according to claim 1 and 2, it is characterised in that the installing plate point
Wei not A plates, B plates, C plates and D plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410755493.XA CN104464490B (en) | 2014-12-11 | 2014-12-11 | Teaching aid for machinery course teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410755493.XA CN104464490B (en) | 2014-12-11 | 2014-12-11 | Teaching aid for machinery course teaching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104464490A CN104464490A (en) | 2015-03-25 |
| CN104464490B true CN104464490B (en) | 2017-05-03 |
Family
ID=52910462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410755493.XA Expired - Fee Related CN104464490B (en) | 2014-12-11 | 2014-12-11 | Teaching aid for machinery course teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104464490B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597350B (en) * | 2018-08-10 | 2023-07-21 | 新疆工程学院 | Teaching aid for displaying mechanical principle of robot |
| CN109712511A (en) * | 2019-01-23 | 2019-05-03 | 烟台工程职业技术学院(烟台市技师学院) | A kind of electrical engineering automated teaching device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2004131799A (en) * | 2004-11-01 | 2006-04-10 | Государственное образовательное учреждение высшего профессионального образовани " Пензенский Государственный Университет" (RU) | TRAINING INSTRUMENT FOR DEMONSTRATION OF A GEAR TRANSFER USING A KODOSKOP |
| TWM336498U (en) * | 2008-02-21 | 2008-07-11 | Kang Hsuan Educational Publish Corp | Teaching tool demonstrating mechanic principles |
| CN201698640U (en) * | 2010-06-12 | 2011-01-05 | 浙江天煌科技实业有限公司 | Device for comprehensive practice training in mechanical technique for assembling and debugging |
| KR20110003047U (en) * | 2009-09-18 | 2011-03-24 | 성석경 | Electric crane kit |
| DE102010039249A1 (en) * | 2010-08-12 | 2012-02-16 | Elabo Trainingssysteme Gmbh Aus- Und Weiterbildung | Didactical teaching material for use in part-time vocational schools, has mechanical aids arranged on board, to vary standing user luminous intensity of luminous elements in lighting direction |
| CN203480757U (en) * | 2013-08-07 | 2014-03-12 | 刘墨涵 | A mechanical transmission mechanism principle demonstrating table |
| CN103971584A (en) * | 2014-05-23 | 2014-08-06 | 武汉理工大学 | Comprehensive demonstrating teaching tool for cam mechanism |
| CN203773860U (en) * | 2014-04-11 | 2014-08-13 | 辽宁工业大学 | Mechanical principle course cam teaching aid |
| CN203787009U (en) * | 2014-03-28 | 2014-08-20 | 浙江亚龙教育装备股份有限公司 | Two-dimensional work platform applied to teaching |
| CN203799572U (en) * | 2014-05-06 | 2014-08-27 | 华中农业大学 | Mechanism storage demonstration integrated cabinet |
| CN203812488U (en) * | 2014-04-23 | 2014-09-03 | 湖北工业大学 | Rotary type multi-configuration machine demonstrating and experimenting table |
| CN104167144A (en) * | 2014-04-22 | 2014-11-26 | 雷康 | Mechanical tower demonstration mechanism |
| CN204270594U (en) * | 2014-12-11 | 2015-04-15 | 潘江如 | A kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering |
-
2014
- 2014-12-11 CN CN201410755493.XA patent/CN104464490B/en not_active Expired - Fee Related
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2004131799A (en) * | 2004-11-01 | 2006-04-10 | Государственное образовательное учреждение высшего профессионального образовани " Пензенский Государственный Университет" (RU) | TRAINING INSTRUMENT FOR DEMONSTRATION OF A GEAR TRANSFER USING A KODOSKOP |
| TWM336498U (en) * | 2008-02-21 | 2008-07-11 | Kang Hsuan Educational Publish Corp | Teaching tool demonstrating mechanic principles |
| KR20110003047U (en) * | 2009-09-18 | 2011-03-24 | 성석경 | Electric crane kit |
| CN201698640U (en) * | 2010-06-12 | 2011-01-05 | 浙江天煌科技实业有限公司 | Device for comprehensive practice training in mechanical technique for assembling and debugging |
| DE102010039249A1 (en) * | 2010-08-12 | 2012-02-16 | Elabo Trainingssysteme Gmbh Aus- Und Weiterbildung | Didactical teaching material for use in part-time vocational schools, has mechanical aids arranged on board, to vary standing user luminous intensity of luminous elements in lighting direction |
| CN203480757U (en) * | 2013-08-07 | 2014-03-12 | 刘墨涵 | A mechanical transmission mechanism principle demonstrating table |
| CN203787009U (en) * | 2014-03-28 | 2014-08-20 | 浙江亚龙教育装备股份有限公司 | Two-dimensional work platform applied to teaching |
| CN203773860U (en) * | 2014-04-11 | 2014-08-13 | 辽宁工业大学 | Mechanical principle course cam teaching aid |
| CN104167144A (en) * | 2014-04-22 | 2014-11-26 | 雷康 | Mechanical tower demonstration mechanism |
| CN203812488U (en) * | 2014-04-23 | 2014-09-03 | 湖北工业大学 | Rotary type multi-configuration machine demonstrating and experimenting table |
| CN203799572U (en) * | 2014-05-06 | 2014-08-27 | 华中农业大学 | Mechanism storage demonstration integrated cabinet |
| CN103971584A (en) * | 2014-05-23 | 2014-08-06 | 武汉理工大学 | Comprehensive demonstrating teaching tool for cam mechanism |
| CN204270594U (en) * | 2014-12-11 | 2015-04-15 | 潘江如 | A kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104464490A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3164622A1 (en) | Multi-speed transmission for rail vehicles | |
| CN106051137A (en) | Multi-gear gearbox and control method thereof | |
| CN202182174U (en) | Automobile electric gearshift mechanism | |
| CN103943022B (en) | A kind of combined appliance for teaching for simulating reversal process | |
| EP2616711A1 (en) | Double clutch transmission having a layshaft design | |
| CN105090393A (en) | Six shift-element step-ratio automatic transmission | |
| DE102011017056A1 (en) | Electric traction drive for electric vehicles | |
| CN104464490B (en) | Teaching aid for machinery course teaching | |
| CN201420838Y (en) | Manual dual-output shaft speed changer | |
| DE102013112981B4 (en) | Continuously variable transmission for a vehicle | |
| CN202203345U (en) | Compound precision cycloid decelerator | |
| CN204270594U (en) | A kind of teaching aid for Teaching of Courses Concerning Mechanical Engineering | |
| CN104141747B (en) | Double-clutch-type hydraulic control stepless speed regulator for tracked vehicle | |
| CN103978894A (en) | Drive axle and car | |
| CN103438161A (en) | Double-clutch automatic gearbox | |
| CN106337905B (en) | A kind of gear arrangement for hybrid vehicle | |
| CN102699037A (en) | Divided flow type master transmission reduction gear box of hot rolling mill | |
| CN203463568U (en) | Double-clutch automatic transmission | |
| CN203162028U (en) | Independent suspension transmission of motor tricycle | |
| CN205780619U (en) | One can self-regulating planet wheel decelerator | |
| CN204061764U (en) | Double-clutch type endless-track vehicle hydraulic stepless speed variator | |
| CN210489029U (en) | Mechanical design basis comprehensive experiment platform for teaching | |
| CN210830351U (en) | Translation and rotation reversing device | |
| CN203931342U (en) | Training platform is analyzed in the integration test of mechanical system overlap joint | |
| CN202992045U (en) | Variable-speed gear of electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171222 Address after: 830091 Nanchang road the Xinjiang Uygur Autonomous Region Urumqi shayibake District No. 236 Xinjiang College of Engineering Patentee after: XINJIANG INSTITUTE OF ENGINEERING Address before: 830000 Nanchang road the Xinjiang Uygur Autonomous Region Urumqi shayibake District No. 236 Xinjiang Engineering College of Mechanical Engineering Department Co-patentee before: Yu Bin Patentee before: Pan Jiangru Co-patentee before: Zhang Yong |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20211211 |