CN212061567U - Mathematics apparatus based on machinery specialty is with mathematics thinking training - Google Patents

Mathematics apparatus based on machinery specialty is with mathematics thinking training Download PDF

Info

Publication number
CN212061567U
CN212061567U CN202020351559.XU CN202020351559U CN212061567U CN 212061567 U CN212061567 U CN 212061567U CN 202020351559 U CN202020351559 U CN 202020351559U CN 212061567 U CN212061567 U CN 212061567U
Authority
CN
China
Prior art keywords
rectangular box
wall
winding shaft
mathematics
mathematical
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
Application number
CN202020351559.XU
Other languages
Chinese (zh)
Inventor
李依蔓
王子雨
何昕朗
赵志禹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heibei University
Original Assignee
Heibei University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heibei University filed Critical Heibei University
Priority to CN202020351559.XU priority Critical patent/CN212061567U/en
Application granted granted Critical
Publication of CN212061567U publication Critical patent/CN212061567U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

The utility model provides a mathematics apparatus based on machinery specialty is with mathematics thinking training. Mathematics apparatus based on machinery specialty is with mathematical thinking training includes: a rectangular box; the two transition shafts are rotatably arranged in the rectangular box; the first winding shaft is rotatably installed in the rectangular box; the second winding shaft is rotatably installed in the rectangular box, and one ends of the first winding shaft and the second winding shaft extend out of the rectangular box; the examination room cloth roll is wound on the second winding shaft, the bottom end of the examination room cloth roll is fixedly connected with the second winding shaft, and the top end of the examination room cloth roll is fixedly connected with the first winding shaft. The utility model provides a mathematics apparatus based on machinery specialty is with mathematics thinking training has the advantage that can promote mr's quality of teaching, increase student's learning efficiency, convenient to use.

Description

Mathematics apparatus based on machinery specialty is with mathematics thinking training
Technical Field
The utility model relates to a teaching aid technical field especially relates to a mathematical apparatus based on machinery specialty is with mathematical thinking training.
Background
The mechanical profession mainly comprises mechanical design and manufacture and automation thereof, material forming and control engineering, industrial design, process equipment and control engineering and the like, advanced mathematics is a necessary course of the mechanical profession, limit and continuity, integral mathematics, vector algebra and space analytic geometry, multivariate function differential chemistry and the like are mainly taught, the mathematics literacy of students is further improved through the teaching of the advanced mathematics, the advanced mathematical operation, space imagination, number and shape combination, thinking and actual application capability of the students are cultured, and a foundation is laid for learning the profession.
More formulas and knowledge points in advanced mathematics need to be mastered in a key mode, in the past, a teacher usually carries out conventional teaching in teaching, and a student masters the knowledge points in a mode of remembering, backing, understanding and continuously learning, however, the mode has poor effect and is not beneficial to the student to master important knowledge points quickly.
Therefore, there is a need to provide a mathematical tool for training mathematical thinking based on machine specialties to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a can promote mr's quality of teaching, increase student's learning efficiency, convenient to use's mathematical apparatus based on machinery specialty is with mathematical thinking training.
In order to solve the technical problem, the utility model provides a mathematics apparatus based on machinery specialty is with mathematics thinking training, include: a rectangular box; the two transition shafts are rotatably arranged in the rectangular box; the first winding shaft is rotatably installed in the rectangular box; the second winding shaft is rotatably installed in the rectangular box, and one ends of the first winding shaft and the second winding shaft extend out of the rectangular box; the question bank cloth roll is wound on the second winding shaft, the bottom end of the question bank cloth roll is fixedly connected with the second winding shaft, the top end of the question bank cloth roll is fixedly connected with the first winding shaft, and the two transition shafts are both contacted with the question bank cloth roll; the first perspective hole is formed in the outer wall of one side of the rectangular box; the second perspective hole is formed in the outer wall of one side of the rectangular box and is positioned on one side of the first perspective hole; the shielding plate is slidably installed on the outer wall of one side of the rectangular box and is matched with the second perspective hole; and the supporting mechanism is arranged at the bottom of the rectangular box.
Preferably, two first fixing holes are formed in the inner walls of the two sides of the rectangular box, two first bearings are fixedly sleeved on the outer wall of the transition shaft, and the outer rings of the first bearings are fixedly connected with the inner walls of the first fixing holes correspondingly.
Preferably, two second fixed orificess have all been seted up on the both sides inner wall of rectangle case, it is equipped with two second bearings, four all to fix the cover on the outer wall of first rolling axle and second rolling axle all with corresponding the inner wall fixed connection of second fixed orificess, it is equipped with two rubber rings, four all to rotate the cover on the outer wall of first rolling axle and second rolling axle the outer lane of rubber ring all with corresponding the inner wall fixed connection of second fixed orificess.
Preferably, the storage box is fixedly mounted on the outer wall of one side of the rectangular box, and the first winding shaft and the second winding shaft are located at the outer end of the rectangular box and are provided with inner hexagonal grooves.
Preferably, a plurality of question partitions are printed on one side surface of the question bank cloth roll at equal intervals, and each question partition consists of a question type area, an answer selection area and a standard answer area.
Preferably, the supporting mechanism comprises two vertical plates and a first bottom base plate, the first bottom base plate is arranged below the rectangular box, the two vertical plates are fixedly arranged at the top of the first bottom base plate, and the tops of the two vertical plates are fixedly connected with the bottom of the rectangular box.
Preferably, the supporting mechanism comprises a second bottom base plate, four guide sleeves, four guide slide bars, a supporting sleeve, a rotary drum and a threaded column, the bottom base plate is arranged below the rectangular box, the four guide sleeves are fixedly arranged at the top of the second bottom base plate, the four guide slide bars are respectively slidably arranged in the four guide sleeves, the four guide slide bars are fixedly connected with the rectangular box at the top ends, the supporting sleeve is fixedly arranged at the top of the second bottom base plate, the rotary drum is rotatably arranged in the supporting sleeve, the threaded column is threadedly arranged in the rotary drum, and the top end of the threaded column is fixedly connected with the rectangular box.
Preferably, the four guide sleeve pipes are fixedly provided with linear bearings on the inner walls, and the four guide slide bars penetrate through the corresponding linear bearings and are in sliding connection with the corresponding inner walls of the linear bearings.
Preferably, a third bearing is fixedly sleeved on the outer wall of the rotary drum, and an outer ring of the third bearing is fixedly connected with the inner wall of the support sleeve.
Preferably, a nut is fixedly mounted on the inner wall of the rotating cylinder, and the threaded column penetrates through the nut and is screwed with the inner wall of the nut.
Compared with the prior art, the utility model provides a mathematics apparatus based on machinery specialty is with mathematics thinking training has following beneficial effect:
by arranging the rectangular box, the first winding shaft, the second winding shaft, the question bank yardage roll, the first perspective hole, the second perspective hole, the shielding plate and other mechanisms, a teacher of higher mathematics can show a plurality of question types to students when reviewing knowledge points for the students, interaction with the students is increased, interest of the students is improved, teaching quality of the teacher can be improved, learning efficiency of the students is improved, and the whole device is simple and convenient to operate; when the platform is used, the height positions of the first perspective holes and the second perspective holes can be adjusted to be proper according to the height of the platform and the requirement of display in actual use, and the use effect is good.
Drawings
FIG. 1 is a front view of a first embodiment of a mathematical tool for training mathematical thinking based on mechanical expertise according to the present invention;
FIG. 2 is a right side cross-sectional view of a first embodiment of a mathematical tool for mathematical thinking training based on mechanical expertise, in accordance with the present invention;
FIG. 3 is a front cross-sectional view of a first embodiment of a mathematical tool for training mathematical thinking based on mechanical expertise, according to the present invention;
FIG. 4 is an enlarged schematic view of portion A shown in FIG. 3;
figure 5 is a partial front view of the inscription library roll shown in figure 2;
FIG. 6 is a front cross-sectional view of a second embodiment of the mathematical tool for training mathematical thinking based on mechanical expertise according to the present invention;
fig. 7 is an enlarged schematic view of a portion B shown in fig. 6.
Reference numbers in the figures: 1. the multifunctional examination table comprises a rectangular box, 2, a transition shaft, 3, a first winding shaft, 4, a second winding shaft, 5, an examination library cloth roll, 501, examination subject partitions, 5001, an examination subject area, 5002, an answer selection area, 5003, a standard answer area, 6, a first perspective hole, 7, a second perspective hole, 8, a shielding plate, 9, a vertical plate, 10, a first bottom backing plate, 11, a second bottom backing plate, 12, a guide sleeve, 13, a guide sliding rod, 14, a support sleeve, 15, a rotary cylinder, 16 and a threaded column.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments.
First embodiment
Referring to fig. 1-5, in a first embodiment of the present invention, a mathematical tool for training mathematical thinking based on mechanical specialties comprises: a rectangular box 1; the two transition shafts 2 are rotatably arranged in the rectangular box 1; the first winding shaft 3 is rotatably arranged in the rectangular box 1; the second winding shaft 4 is rotatably installed in the rectangular box 1, and one end of each of the first winding shaft 3 and the second winding shaft 4 extends out of the rectangular box 1; the question bank cloth roll 5 is wound on the second winding shaft 4, the bottom end of the question bank cloth roll 5 is fixedly connected with the second winding shaft 4, the top end of the question bank cloth roll 5 is fixedly connected with the first winding shaft 3, and the two transition shafts 2 are both contacted with the question bank cloth roll 5; the first perspective hole 6 is formed in the outer wall of one side of the rectangular box 1; the second perspective hole 7 is formed in the outer wall of one side of the rectangular box 1, and the second perspective hole 7 is located on one side of the first perspective hole 6; the shielding plate 8 is slidably installed on the outer wall of one side of the rectangular box 1, and the shielding plate 8 is matched with the second perspective hole 7; and the supporting mechanism is arranged at the bottom of the rectangular box 1.
Two first fixed orificess have all been seted up on the both sides inner wall of rectangle case 1, two all fixed cover is equipped with two first bearings, four on the outer wall of transition axle 2 the outer lane of first bearing all with corresponding the inner wall fixed connection of first fixed orificess.
Two second fixed orificess have all been seted up on the both sides inner wall of rectangle case 1, it is equipped with two second bearings, four all to fix the cover on the outer wall of first rolling axle 3 and second rolling axle 4 the outer lane of second bearing all with corresponding the inner wall fixed connection of second fixed orificess, it is equipped with two rubber rings, four all to rotate the cover on the outer wall of first rolling axle 3 and second rolling axle 4 the outer lane of rubber ring all with corresponding the inner wall fixed connection of second fixed orificess.
The rectangular box is characterized in that a storage box is fixedly mounted on the outer wall of one side of the rectangular box 1, and the first winding shaft 3 and the second winding shaft 4 are located at the outer end of the rectangular box 1 and are provided with inner hexagonal grooves.
A plurality of question partitions 501 are printed on one side surface of the question bank cloth roll 5 at equal intervals, and each question partition 501 consists of a question type partition 5001, an answer selection partition 5002 and a standard answer partition 5003.
The supporting mechanism comprises two vertical plates 9 and a first bottom base plate 10, the first bottom base plate 10 is arranged below the rectangular box 1, the two vertical plates 9 are fixedly arranged at the top of the first bottom base plate 10, and the tops of the two vertical plates 9 are fixedly connected with the bottom of the rectangular box 1.
In this embodiment:
the first step is as follows: every topic subregion 501 prints an topic type, the question type district 5001 prints the problem, answer selection district 5002 prints four answers, and four answers all mark different serial numbers, and standard answer district 5003 prints the serial number that has correct answer, and this device cooperation crank uses, and the plug of crank and the hexagonal groove looks adaptation of seting up on first rolling axle 3 or the second rolling axle 4 deposit the case and be used for accomodating the crank.
The second step is that: when a teacher of higher mathematics gives students review of knowledge points, the teacher of higher mathematics can rotate the first winding shaft 3 by using a crank, the first winding shaft 3 can wind the question bank yardage roll 5, meanwhile, the second winding shaft 4 is released, the question partitions 501 sequentially pass through the first perspective hole 6 in the winding process, the question type areas 5001 printed with questions and the answer selection areas 5002 printed with four answers can be seen by the students through the first perspective hole 6, the teacher can select the students, the standard case areas 5003 printed with standard answer numbers are blocked by the shielding plates 8 and cannot be seen, after the students answer, the teacher can open the shielding plates 8 to show the final forward-selected answers to the students, then the knowledge points and the answer thoughts of the question types are described according to the correct answers, the learning efficiency of the students can be effectively improved, after the interpretation of a question is completed, the first winding shaft 3 is rotated, can carry out the switching of next problem, first rolling axle 3 and second rolling axle 4 form the damping by two rubber circles, under the circumstances that need not crank pivoted, can guarantee that first rolling axle 3 and second rolling axle 4 are difficult for taking place to rotate.
Compared with the prior art, the utility model provides a mathematics apparatus based on machinery specialty is with mathematics thinking training has following beneficial effect:
through setting up mechanisms such as rectangle case 1, first rolling axle 3, second rolling axle 4, question storehouse yardage roll 5, first perspective hole 6, second perspective hole 7, sunshade 8, when can making higher mathematics mr give student review knowledge point, to the multiple question type of student's show, increase with student's interdynamic improves student's interest, can promote mr teaching quality, increase student's learning efficiency, and whole device easy operation is convenient.
Second embodiment:
based on the mathematical tool based on the mechanical professional mathematical thinking training provided by the first embodiment of the application, the second embodiment of the application provides another mathematical tool based on the mechanical professional mathematical thinking training. The second embodiment is merely a preferred way of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.
The second embodiment of the present invention will be further explained with reference to the drawings and the embodiments.
Referring to fig. 6-7, in a second embodiment of the present invention, a mathematical tool for training mathematical thinking based on mechanical specialties comprises a rectangular box 1; the two transition shafts 2 are rotatably arranged in the rectangular box 1; the first winding shaft 3 is rotatably arranged in the rectangular box 1; the second winding shaft 4 is rotatably installed in the rectangular box 1, and one end of each of the first winding shaft 3 and the second winding shaft 4 extends out of the rectangular box 1; the question bank cloth roll 5 is wound on the second winding shaft 4, the bottom end of the question bank cloth roll 5 is fixedly connected with the second winding shaft 4, the top end of the question bank cloth roll 5 is fixedly connected with the first winding shaft 3, and the two transition shafts 2 are both contacted with the question bank cloth roll 5; the first perspective hole 6 is formed in the outer wall of one side of the rectangular box 1; the second perspective hole 7 is formed in the outer wall of one side of the rectangular box 1, and the second perspective hole 7 is located on one side of the first perspective hole 6; the shielding plate 8 is slidably installed on the outer wall of one side of the rectangular box 1, and the shielding plate 8 is matched with the second perspective hole 7; and the supporting mechanism is arranged at the bottom of the rectangular box 1.
Two first fixed orificess have all been seted up on the both sides inner wall of rectangle case 1, two all fixed cover is equipped with two first bearings, four on the outer wall of transition axle 2 the outer lane of first bearing all with corresponding the inner wall fixed connection of first fixed orificess.
Two second fixed orificess have all been seted up on the both sides inner wall of rectangle case 1, it is equipped with two second bearings, four all to fix the cover on the outer wall of first rolling axle 3 and second rolling axle 4 the outer lane of second bearing all with corresponding the inner wall fixed connection of second fixed orificess, it is equipped with two rubber rings, four all to rotate the cover on the outer wall of first rolling axle 3 and second rolling axle 4 the outer lane of rubber ring all with corresponding the inner wall fixed connection of second fixed orificess.
The rectangular box is characterized in that a storage box is fixedly mounted on the outer wall of one side of the rectangular box 1, and the first winding shaft 3 and the second winding shaft 4 are located at the outer end of the rectangular box 1 and are provided with inner hexagonal grooves.
A plurality of question partitions 501 are printed on one side surface of the question bank cloth roll 5 at equal intervals, and each question partition 501 consists of a question type partition 5001, an answer selection partition 5002 and a standard answer partition 5003.
The supporting mechanism comprises a second bottom cushion plate 11, four guide sleeves 12, four guide slide bars 13, a supporting sleeve 14, a rotary drum 15 and a threaded column 16, wherein the bottom cushion plate 11 is arranged below the rectangular box 1, the four guide sleeves 12 are fixedly arranged at the top of the second bottom cushion plate 11, the four guide slide bars 13 are respectively slidably arranged in the four guide sleeves 12, the four top ends of the guide slide bars 13 are fixedly connected with the rectangular box 1, the supporting sleeve 14 is fixedly arranged at the top of the second bottom cushion plate 11, the rotary drum 15 is rotatably arranged in the supporting sleeve 14, the threaded column 16 is threadedly arranged in the rotary drum 15, and the top end of the threaded column 16 is fixedly connected with the rectangular box 1.
The inner walls of the four guide sleeves 12 are all fixedly provided with linear bearings, and the four guide slide bars 13 all penetrate through the corresponding linear bearings and are in sliding connection with the inner walls of the corresponding linear bearings.
A third bearing is fixedly sleeved on the outer wall of the rotating cylinder 15, and the outer ring of the third bearing is fixedly connected with the inner wall of the supporting sleeve 14.
A nut is fixedly arranged on the inner wall of the rotating cylinder 15, and the threaded column 16 penetrates through the nut and is screwed with the inner wall of the nut.
In this embodiment:
the outer wall of the rotating drum 15 is also provided with a plurality of rotating rods;
when using, according to the height of podium and the needs that demonstrate during the in-service use, can adjust the height of first perspective hole 6 and second perspective hole 7, during the regulation, clockwise or anticlockwise rotation dwang can make rotary drum 15 rotate correspondingly, rotary drum 15 can drive screw post 16 at clockwise or anticlockwise pivoted in-process and rise or descend to the height that makes rectangle case 1 can be adjusted, then can make the height position adjustment of first perspective hole 6 and second perspective hole 7 suitable, make the result of use better.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a mathematics apparatus based on machinery specialty is with mathematical thinking training which characterized in that includes:
a rectangular box;
the two transition shafts are rotatably arranged in the rectangular box;
the first winding shaft is rotatably installed in the rectangular box;
the second winding shaft is rotatably installed in the rectangular box, and one ends of the first winding shaft and the second winding shaft extend out of the rectangular box;
the question bank cloth roll is wound on the second winding shaft, the bottom end of the question bank cloth roll is fixedly connected with the second winding shaft, the top end of the question bank cloth roll is fixedly connected with the first winding shaft, and the two transition shafts are both contacted with the question bank cloth roll;
the first perspective hole is formed in the outer wall of one side of the rectangular box;
the second perspective hole is formed in the outer wall of one side of the rectangular box and is positioned on one side of the first perspective hole;
the shielding plate is slidably installed on the outer wall of one side of the rectangular box and is matched with the second perspective hole;
and the supporting mechanism is arranged at the bottom of the rectangular box.
2. The mathematics tool based on mechanical special mathematics thinking training of machinery special uses of claim 1, wherein, the both sides of rectangle case inner wall has all seted up two first fixed orificess, all fixed the cover is equipped with two first bearings on the outer wall of two said transition axles, the outer lane of four said first bearings all with corresponding the inner wall fixed connection of first fixed orificess.
3. The mathematics apparatus based on mechanical special mathematics thinking training of machinery special uses of claim 1, wherein two second fixed holes are opened on both sides of the rectangular box, two second bearings are fixedly sleeved on the outer walls of the first rolling shaft and the second rolling shaft, the outer rings of the four second bearings are fixedly connected with the corresponding inner wall of the second fixed hole, two rubber rings are rotatably sleeved on the outer walls of the first rolling shaft and the second rolling shaft, and the outer rings of the four rubber rings are fixedly connected with the corresponding inner wall of the second fixed hole.
4. The mathematics apparatus for mathematics thinking training based on machinery specialty of claim 1, wherein said rectangular box is fixed with a storage box on one side of the outer wall, and said first and second winding shafts are equipped with inner hexagonal slots at the outer end of said rectangular box.
5. The math figure training device for math thinking based on mechanical profession of claim 1, wherein a plurality of question partitions are printed on one side of the question bank cloth roll at equal intervals, and each question partition is composed of a question type area, an answer selection area and a standard answer area.
6. The mathematical tool for mathematical thinking training based on mechanical profession as claimed in claim 1, wherein the supporting mechanism comprises two vertical plates and a first bottom pad, the first bottom pad is disposed under the rectangular box, the two vertical plates are both fixedly mounted on the top of the first bottom pad, and the top of the two vertical plates are both fixedly connected with the bottom of the rectangular box.
7. The mathematical tool for mechanical expertise based mathematical thinking training according to claim 1, wherein the supporting mechanism comprises a second bottom base plate, four guide sleeves, four guide slide bars, a supporting sleeve, a rotating drum and a threaded column, the bottom base plate is arranged below the rectangular box, the four guide sleeves are all fixedly arranged on the top of the second bottom base plate, the four guide slide bars are respectively and slidably arranged in the four guide sleeves, the top ends of the four guide slide bars are all fixedly connected with the rectangular box, the supporting sleeve is fixedly arranged on the top of the second bottom base plate, the rotating drum is rotatably arranged in the supporting sleeve, the threaded column is threadedly arranged in the rotating drum, and the top end of the threaded column is fixedly connected with the rectangular box.
8. The mathematical tool for mechanical training of mathematical thinking according to claim 7 wherein the four guide sleeves are fixedly provided with linear bearings on the inner walls thereof, and the four guide sliding rods penetrate the corresponding linear bearings and are slidably connected with the inner walls of the corresponding linear bearings.
9. The mathematical tool for training mathematical thinking based on mechanical profession as claimed in claim 7, wherein the outer wall of the rotating cylinder is fixedly sleeved with a third bearing, and the outer ring of the third bearing is fixedly connected with the inner wall of the supporting sleeve.
10. The mathematical tool for training mathematical thinking based on mechanical profession of claim 7 wherein a nut is fixedly installed on the inner wall of the rotary cylinder, and the threaded column penetrates through the nut and is screwed with the inner wall of the nut.
CN202020351559.XU 2020-03-19 2020-03-19 Mathematics apparatus based on machinery specialty is with mathematics thinking training Expired - Fee Related CN212061567U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020351559.XU CN212061567U (en) 2020-03-19 2020-03-19 Mathematics apparatus based on machinery specialty is with mathematics thinking training

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020351559.XU CN212061567U (en) 2020-03-19 2020-03-19 Mathematics apparatus based on machinery specialty is with mathematics thinking training

Publications (1)

Publication Number Publication Date
CN212061567U true CN212061567U (en) 2020-12-01

Family

ID=73530710

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020351559.XU Expired - Fee Related CN212061567U (en) 2020-03-19 2020-03-19 Mathematics apparatus based on machinery specialty is with mathematics thinking training

Country Status (1)

Country Link
CN (1) CN212061567U (en)

Similar Documents

Publication Publication Date Title
Tobin et al. What happens in high school science classrooms?
CN209895506U (en) Auxiliary memory device for mathematical formula
CN207966243U (en) A kind of higher mathematics Function Teaching demonstrator
CN212061567U (en) Mathematics apparatus based on machinery specialty is with mathematics thinking training
CN209898647U (en) Mathematics teaching is with supplementary drawing device
CN215126676U (en) Collapsible easy to detach's mathematics is analytic to be used show shelf
CN208017124U (en) A kind of language teaching device
CN215125402U (en) Auxiliary device for teaching
CN205920687U (en) Theory of mechanics experiment teaching aid
Knight et al. “Problems and Methods in Research”: A Course for the Beginning Researcher in the Social Sciences
CN110874975B (en) Organic chemical organic matter structural formula learning and teaching method
US1864022A (en) Educational device
CN207380947U (en) A kind of mathematical model apparatus for demonstrating
CN209003245U (en) A kind of Novel art designed teaching hanger
CN107909891B (en) English translation demonstration board
CN210924966U (en) Teaching device for innovation and entrepreneurship course
CN108538154A (en) A kind of student learns to use demonstration device for probability
CN214068074U (en) Primary school mathematics teaching demonstration device
CN206379067U (en) A kind of mathematical education coordinate system space apparatus for demonstrating
CN215679662U (en) Middle and primary school's english word spelling device
CN214475592U (en) A word machine for english teaching
CN214068088U (en) Mathematical model for cultivating mathematical thinking of pupils
CN216486856U (en) Electric automatization specialty teaching analogue means
Todhunter The Elements of Euclid for the use of schools and colleges
CN113674591A (en) Equation memory device for advanced mathematics and use method thereof

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
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: 20201201