CN110223571A - A kind of solid geometry demonstration teaching aid - Google Patents

A kind of solid geometry demonstration teaching aid Download PDF

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Publication number
CN110223571A
CN110223571A CN201910415138.0A CN201910415138A CN110223571A CN 110223571 A CN110223571 A CN 110223571A CN 201910415138 A CN201910415138 A CN 201910415138A CN 110223571 A CN110223571 A CN 110223571A
Authority
CN
China
Prior art keywords
several
solid geometry
teaching aid
demonstration teaching
rod
Prior art date
Application number
CN201910415138.0A
Other languages
Chinese (zh)
Inventor
搴疯揪
康达
Original Assignee
浙江工贸职业技术学院
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 浙江工贸职业技术学院 filed Critical 浙江工贸职业技术学院
Priority to CN201910415138.0A priority Critical patent/CN110223571A/en
Publication of CN110223571A publication Critical patent/CN110223571A/en

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/02Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
    • G09B23/04Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics for geometry, trigonometry, projection or perspective

Abstract

This application provides a kind of solid geometry demonstration teaching aids, comprising: several connectors are equipped with several spelling joints on each connector;Several connecting rods, each connecting rod both ends pass through quick disconnecting joint and are detachably connected on corresponding spelling joint;Wherein, several connectors and several connecting rods are interconnected to constitute solid geometry shape by several quick disconnecting joints.Solid geometry demonstration teaching aid provided by the present application facilitates the building of student's space imagining ability, is conducive to deepen classmate to the rational learning of solid geometry, promotes teaching efficiency.

Description

A kind of solid geometry demonstration teaching aid

Technical field

The present invention relates to a kind of solid geometry demonstration teaching aids, more particularly to a kind of solid geometry demonstration teaching aid.

Background technique

It is found during mathematical education, when learning solid geometry, partial students are poor due to space multistory sense, it is difficult to will Two-dimensional plan view is abstracted as a three-dimensional solid figure in brain, and the study understanding of students is relatively difficult, and When handling more complicated solid figure, students also easily confusion reigned, therefore, teacher is often used one in teaching process A little solid geometry teaching aids, so that students are more intuitively learnt, but existing solid geometry teaching aid be mostly it is wooden or The physical model of plastics, a model can only show that a kind of geometry, poor universality need in teaching process because attending class When wanting the model of multiple geometries, teacher carries extremely inconvenient.

In conclusion teacher caused by how overcoming the problems, such as conventional model due to poor universality attends class inconvenient to carry, it is Those skilled in the art's urgent problem.

Summary of the invention

The object of the present invention is to provide a kind of solid geometry demonstration teaching aids, solve conventional model and make because versatility is poor At teacher attend class problem inconvenient to carry.

In order to solve the above technical problems, the invention provides the following technical scheme: a kind of solid geometry demonstration teaching aid, comprising: Several connectors are equipped with several spelling joints on each connector;Several connecting rods, each connecting rod both ends pass through Quick disconnecting joint is detachably connected on corresponding spelling joint;Wherein, several connectors and several connecting rods pass through several A quick disconnecting joint is interconnected to constitute solid geometry shape.

Further, each connector has matrix, and described matrix is equipped with several spelling joints, described matrix and described Connecting rod is ferrous material.

Further, further include auxiliary connecting rod, the auxiliary connecting rod include an elastic drag rope and a pair of magnetic suction nozzle, one The both ends of the elastic drag rope are separately mounted to magnetic tip, a pair of magnetic suction nozzle can be adsorbed on corresponding connector respectively On matrix or in corresponding connecting rod.

Further, the quick disconnecting joint includes pedestal, and the ontology of the pedestal is mounted on the end of the connecting rod, The front end of the ontology is equipped with grafting pipe portion, and the spelling joint can be inserted into the spliced eye of the grafting pipe portion, the insertion pipe Several card holes are additionally provided in portion, the card hole is connected with the spliced eye, and the periphery of the ontology is equipped with the first outer ring The rear portion of shape boss portion, the periphery in first outer ring boss portion is equipped with the second outer ring boss portion;Movable sleeve, the work Dynamic set is set on the pedestal, and the rear end of the movable sleeve can contradict the front end face in second outer ring boss portion On, the inner wall of the front of the movable sleeve is equipped with annular boss;Several decorative pearls on top of an official cap, the decorative pearl on top of an official cap are movably arranged on accordingly In card hole, the lower end of the decorative pearl on top of an official cap can be protruded into the spliced eye and be fastened in the annular slot of the spelling joint, the top The upper end of pearl can contradict on the internal perisporium of the annular boss or can contradict on the inner wall of the front end of the movable sleeve;Lock Determine spring, the Lock spring is set in the grafting pipe portion, and one end of the Lock spring contradicts outside described first On the front end face in annular convex platform portion, the other end of the Lock spring is contradicted on the rear end face of the annular boss;Baffle ring, The baffle ring is mounted on the front end of the grafting pipe portion, and the baffle ring is kept out in the front end of the movable sleeve.

Further, the quick disconnecting joint also has propelling piece, and the propelling piece is mounted on the bottom wall of the spliced eye On, by the outside pushing tow of the spelling joint when propelling piece out of described spliced eye for extracting the spelling joint, torn open with auxiliary Under the spelling joint.

Further, the propelling piece has a base plate and a pair of of elastic telescopic arm, and a pair of of elastic telescopic arm is symmetrical It is connected in the base plate, a pair of of elastic telescopic arm all has folded sheet portion.

Further, the front end of a pair of of elastic telescopic arm is equipped with arc heel, and the arc heel can contradict On the front end face of the spelling joint.

Further, the card hole has cylindricality hole portion and tapered hole part, the big end of the tapered hole part and the column The connection of shape hole portion, the small end of the tapered hole part are connected to the spliced eye, and the diameter of the tapered hole part small end is less than described The diameter of the decorative pearl on top of an official cap.

Further, the front end of the annular boss has the second arc guide face, the second arc guide face and institute State the internal perisporium transition connection of annular boss.

It can be seen from above-mentioned technical proposal the invention has the following advantages:

In the present invention, solid geometry demonstration teaching aid is designed as Demountable, so that teaching aid is convenient for being carried and storing, Simultaneously in teaching process, classmate can follow teacher to experience the assembled process of solid geometry together, be conducive to deepen classmate couple The rational learning of solid geometry facilitates the building of student's space imagining ability;

Auxiliary connecting rod can be mounted on teaching aid according to teaching demand, to spies such as the diagonal lines that shows solid geometry shape Sign is convenient for the more intuitive rational learning of classmate, promotes teaching efficiency;

The connection of connector and connecting rod, disassembly process are simple and convenient for operation, allow teacher on classroom rapidly The assembly for completing teaching aid is conducive to the demonstration of solid geometry teaching, improves solid geometry teaching effect.

The present invention is described in further detail with reference to the accompanying drawings and detailed description.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.

The assembly structure diagram that Fig. 1 is the present invention when being square.

Fig. 2 is a structural schematic diagram of connector of the present invention.

Fig. 3 is the schematic cross-sectional view of connector and connecting rod junction of the invention.

Fig. 4 is the enlarged structure schematic diagram in Fig. 3 at A.

Structural schematic diagram when Fig. 5 is another state of Fig. 3.

Fig. 6 is the enlarged structure schematic diagram at the B in Fig. 5.

Fig. 7 is the structural schematic diagram of propelling piece of the invention.

Description of symbols: connector 1, matrix 11, spelling joint 12, base portion 121, inserted link portion 122, annular slot 1221, the first arc guide face 1222, connecting rod 2, quick disconnecting joint 3, pedestal 31, ontology 311, grafting pipe portion 312, spliced eye 3121, the first outer ring boss portion 313, threaded hole 3131, the second outer ring boss portion 314, card hole 315, cylindricality hole portion 3151, Tapered hole part 3152, movable sleeve 32, cannula portion 321, annular boss 322, the second arc guide face 3221, gear pipe portion 323, locking Spring 33, baffle ring 34, the decorative pearl on top of an official cap 35, propelling piece 36, base plate 361, elastic telescopic arm 362, folded sheet portion 3621, arc heel 3622, screw 37, auxiliary connecting rod 4, magnetic tip 41, elastic drag rope 42.

Specific embodiment

The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims Implement with the multitude of different ways of covering.

Below with reference to Fig. 1 to Fig. 7, the invention will be further described, a kind of solid geometry demonstration teaching aid as shown in Figure 1, It include: several connectors 1 and several connecting rods 2, each connector 1 all has matrix 11, is equipped on matrix 11 several A spelling joint 12, each 2 both ends of connecting rod pass through quick disconnecting joint 3 and are detachably connected on corresponding spelling joint 12, several A connector 1 and several connecting rods 2 are interconnected to constitute solid geometry shape by several quick disconnecting joints 3, as square, The solid geometry shape such as triangular prism, solid geometry demonstration teaching aid are designed as Demountable so that teaching aid convenient for being carried and Storage, while in teaching process, classmate can follow teacher to experience the assembled process of solid geometry together, be conducive to deepen same The rational learning to solid geometry is learned, facilitates the building of student's space imagining ability, in addition, the connecting rod 2 and Quick Release of teaching aid Connector 3 can be used for the assembly of a variety of solid geometry shapes, and solid geometry demonstration teaching aid further includes auxiliary connecting rod 4, and auxiliary connecting rod 4 wraps An elastic drag rope 42 and a pair of magnetic suction nozzle 41 are included, a pair of magnetic suction nozzle 41 is separately mounted to the both ends of elastic drag rope 42, matrix 11 and connecting rod 2 be ferrous material, a pair of magnetic suction nozzle 41 can be absorbed and fixed at respectively on the matrix 11 of corresponding connector 1 Or in corresponding connecting rod 2, auxiliary connecting rod 4 is equipped with several, and auxiliary connecting rod 4 can be mounted on teaching aid according to teaching demand, uses With features such as the diagonal lines that shows solid geometry shape, it is convenient for the more intuitive rational learning of classmate, promotes teaching efficiency.

In the present embodiment, as shown in Figure 1, Figure 2, Figure 3 shows, matrix 11 can be hollow ball, and spelling joint 12 has base portion 121 With inserted link portion 122, base portion 121 is fixed on matrix 11, and the front in inserted link portion 122 is equipped with annular slot 1221, inserted link portion 122 Front end be equipped with the first arc guide face 1222.

In the present embodiment, as shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, quick disconnecting joint 3 has pedestal 31, movable sleeve 32, locking bullet Spring 33, baffle ring 34 and several decorative pearls on top of an official cap 35, the ontology 311 of pedestal 31 are connected through a screw thread the end for being mounted on connecting rod 2, ontology 311 front end is equipped with grafting pipe portion 312, and the inserted link portion 122 of spelling joint 12 can be inserted into the spliced eye 3121 of grafting pipe portion 312, Several card holes 315 are additionally provided in grafting pipe portion 312, card hole 315 has cylindricality hole portion 3151 and tapered hole part 3152, bellmouth The big end in portion 3152 is connected to cylindricality hole portion 3151, and the small end of tapered hole part 3152 is connected to spliced eye 3121, tapered hole part The diameter of 3152 small ends is less than the diameter of the decorative pearl on top of an official cap 35, falls out of card hole 315 to avoid the decorative pearl on top of an official cap 35, sets on the periphery of ontology 311 There is the first outer ring boss portion 313, the rear portion of the periphery in the first outer ring boss portion 313 is equipped with the second outer ring boss portion 314, the cannula portion 321 of movable sleeve 32 is set on pedestal 31, and the rear end of cannula portion 321 can contradict in the second outer ring boss portion On 314 front end face, the inner wall of the front of cannula portion 321 is equipped with annular boss 322, and the front end of annular boss 322 has There is the second arc guide face 3221, the second arc guide face 3221 is connect with the internal perisporium transition of annular boss 322,35 activity of the decorative pearl on top of an official cap It is arranged in corresponding card hole 315, the lower end of the decorative pearl on top of an official cap 35 can be protruded into spliced eye 3121 and be fastened on the annular snap in inserted link portion 122 In slot 1221, the upper end of the decorative pearl on top of an official cap 35 can contradict on the internal perisporium of interior annular convex platform 322 or can contradict being located in movable sleeve 32 On the inner wall of the gear pipe portion 323 of 321 front end of cannula portion, Lock spring 33 is set in grafting pipe portion 312, and Lock spring 33 One end contradicts on the front end face in the first outer ring boss portion 313, and the other end of Lock spring 33 is contradicted in interior annular convex platform 322 Rear end face on, baffle ring 34 keeps out the gear pipe portion in movable sleeve 32 by being threadably mounted at the front of grafting pipe portion 312, baffle ring 34 323 front end.

In the present embodiment, as shown in Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, quick disconnecting joint 3 also has propelling piece 36, propelling piece 36 Be mounted on the bottom wall of spliced eye 3121, propelling piece 36 be used for out of spliced eye 3121 extract spelling joint 12 when by spelling joint 12 to Outer pushing tow removes spelling joint 12 with auxiliary, and propelling piece 36 is bent by one piece of elastic plate, and propelling piece 36 has a base plate 361 and a pair of of elastic telescopic arm 362, a pair of of elastic telescopic arm 362 is symmetrically connected in base plate 361, a pair of of elastic telescopic arm 362 all have folded sheet portion 3621, and folded sheet portion 3621 can generate deformation, the front end of elastic telescopic arm 362 when being pressurized and squeezing It is equipped with arc heel 3622, a pair of of arc heel 3622 can contradict on the front end face of spelling joint 12.

In the present embodiment, as shown in figs. 3 and 5, for the ease of disassembly, screw thread is equipped with a screw 37 on movable sleeve 32, when The rear end of movable sleeve 32 contradicts when in the second outer ring boss portion 314, and torsion screw 37 can make screw 37 and the first outer ring Threaded hole 3131 in boss portion 313 is threadedly coupled.

In the present embodiment, as shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, in splicing connecting piece 1 and connecting rod 2, Quick Release is first pushed The movable sleeve 32 of connector 3 contradicts the rear end of movable sleeve 32 in the second outer ring boss portion 314, and Lock spring 33 is compressed, Annular boss 322 is removed from the top of the decorative pearl on top of an official cap 35, is threadedly coupled screw 37 with threaded hole 3131 with retrotorsion screw 37, so The inserted link portion 122 of spelling joint 12 is inserted into the spliced eye 3121 of quick disconnecting joint 3 again afterwards, the first arc guide face in inserted link portion 122 1222 push the decorative pearl on top of an official cap 35, make being moved radially outward along grafting pipe portion 312 in card hole 315 of the decorative pearl on top of an official cap 35, the front end in inserted link portion 122 Face compresses a pair of of arc heel 3622 of propelling piece 36, until the front end of grafting pipe portion 312 contradicts the pedestal in spelling joint 12 In portion 121, propelling piece 36 is extruded generation deformation, and then turn-back screw 37 separates screw 37 with threaded hole 3131, living Dynamic set 32 resets under the action of Lock spring 33, and the second arc guide face 3221 of annular boss 322 pushes the decorative pearl on top of an official cap 35, makes to push up The moving radially inwardly along grafting pipe portion 312 in card hole 315 of pearl 35, the lower end of the decorative pearl on top of an official cap 35 are fastened on the annular snap of spelling joint 12 In slot 1221, the upper end of the decorative pearl on top of an official cap 35 is contradicted on the internal perisporium of interior annular convex platform 322, at this point, connecting rod 2 is connected spelling joint On 12, and the setting of several decorative pearls on top of an official cap 35 is so that connecting rod 2 and the connection of spelling joint 12 are relatively reliable, connecting rod 2 and spelling joint 12 installation process is easy to operate, quick, when decoupling connecting rod 2 and spelling joint 12, first pushes the movable sleeve of quick disconnecting joint 3 32, contradict the rear end of movable sleeve 32 in the second outer ring boss portion 314, then reversing screw 37 makes screw 37 and threaded hole 3131 be threadedly coupled, the propelling piece 36 of subsequent deformation by the outside pushing tow of spelling joint 12, at this time by the inserted link portion 122 of spelling joint 12 from It is extracted in quick disconnecting joint 3, connecting rod 2 and the disassembly process of spelling joint 12 are easy to operate, laborsaving, quick.

These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (9)

1. a kind of solid geometry demonstration teaching aid characterized by comprising
Several connectors (1) are equipped with several spelling joints (12) on each connector (1);
Several connecting rods (2), each connecting rod (2) both ends pass through quick disconnecting joint (3) and are detachably connected to spell accordingly On connector (12);
Wherein, several connectors (1) and several connecting rods (2) are interconnected to constitute vertical by several quick disconnecting joints (3) Body geometry.
2. solid geometry demonstration teaching aid according to claim 1, which is characterized in that each connector (1) has matrix (11), described matrix (11) is equipped with several spelling joints (12), and described matrix (11) and the connecting rod (2) are irony material Material.
3. solid geometry demonstration teaching aid according to claim 2, which is characterized in that it further include auxiliary connecting rod (4), it is described auxiliary Helping connecting rod (4) includes an elastic drag rope (42) and a pair of magnetic suction nozzle (41), and a pair of magnetic suction nozzle (41) is separately mounted to described The both ends of elastic drag rope (42), a pair of magnetic suction nozzle (41) can be adsorbed on respectively on the matrix (11) of corresponding connector (1) or In corresponding connecting rod (2).
4. solid geometry demonstration teaching aid according to claim 1, which is characterized in that the quick disconnecting joint (3) includes
Pedestal (31), the ontology (311) of the pedestal (31) are mounted on the end of the connecting rod (2), the ontology (311) Front end is equipped with grafting pipe portion (312), and the spelling joint (12) can be inserted into the spliced eye (3121) of the grafting pipe portion (312), Several card holes (315) are additionally provided on the grafting pipe portion (312), the card hole (315) is connected with the spliced eye (3121) Logical, the periphery of the ontology (311) is equipped with the first outer ring boss portion (313), first outer ring boss portion (313) The rear portion of periphery is equipped with the second outer ring boss portion (314);
Movable sleeve (32), the movable sleeve (32) is set on the pedestal (31), and the rear end of the movable sleeve (32) can be supported On the front end face in second outer ring boss portion (314), the inner wall of the front of the movable sleeve (32) is equipped with inner ring for touching Shape boss (322);
Several decorative pearls on top of an official cap (35), the decorative pearl on top of an official cap (35) are movably arranged in corresponding card hole (315), the lower end of the decorative pearl on top of an official cap (35) It can protrude into the spliced eye (3121) and be fastened in the annular slot (1221) of the spelling joint (12), the decorative pearl on top of an official cap (35) Upper end can contradict on the internal perisporium of the annular boss (322) or can contradict in the interior of the front end of the movable sleeve (32) On wall;
Lock spring (33), the Lock spring (33) is set on the grafting pipe portion (312), and the Lock spring (33) One end contradict on the front end face in first outer ring boss portion (313), the other end of the Lock spring (33) contradicts On the rear end face of the annular boss (322);
Baffle ring (34), the baffle ring (34) are mounted on the front end of the grafting pipe portion (312), and the baffle ring (34) is kept out described The front end of movable sleeve (32).
5. solid geometry demonstration teaching aid according to claim 4, which is characterized in that the quick disconnecting joint (3), which also has, helps Push piece (36), the propelling piece (36) are mounted on the bottom wall of the spliced eye (3121), and the propelling piece (36) is used for from institute It states by the spelling joint (12) outside pushing tow when extracting spelling joint (12) in spliced eye (3121), the spelling is removed with auxiliary Connector (12).
6. solid geometry demonstration teaching aid according to claim 5, which is characterized in that the propelling piece (36) has a bottom plate Portion (361) and a pair of of elastic telescopic arm (362), a pair of of elastic telescopic arm (362) are symmetrically connected on the base plate (361), A pair of of elastic telescopic arm (362) all has folded sheet portion (3621).
7. solid geometry demonstration teaching aid according to claim 6, which is characterized in that before a pair of of elastic telescopic arm (362) End is equipped with arc heel (3622), and the arc heel (3622) can contradict the front end face in the spelling joint (12) On.
8. solid geometry demonstration teaching aid according to claim 4, which is characterized in that the card hole (315) has cylindrical hole Portion (3151) and tapered hole part (3152), the big end of the tapered hole part (3152) are connected to the cylindricality hole portion (3151), institute The small end for stating tapered hole part (3152) is connected to the spliced eye (3121), and the diameter of tapered hole part (3152) small end is less than The diameter of the decorative pearl on top of an official cap (35).
9. solid geometry demonstration teaching aid according to claim 4, which is characterized in that before the annular boss (322) End has the second arc guide face (3221), the internal perisporium of the second arc guide face (3221) and the annular boss (322) Transition connection.
CN201910415138.0A 2019-05-17 2019-05-17 A kind of solid geometry demonstration teaching aid CN110223571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910415138.0A CN110223571A (en) 2019-05-17 2019-05-17 A kind of solid geometry demonstration teaching aid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910415138.0A CN110223571A (en) 2019-05-17 2019-05-17 A kind of solid geometry demonstration teaching aid

Publications (1)

Publication Number Publication Date
CN110223571A true CN110223571A (en) 2019-09-10

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422565A (en) * 1965-01-04 1969-01-21 Lucius H Kentfield Tube,plug and resilient link construction device
CN2068262U (en) * 1990-06-19 1990-12-26 张瑜 Object demonstrating instrument for solid geometry
CN201556319U (en) * 2009-05-15 2010-08-18 邹庆平 Assembled solid geometry demonstration teaching aid
CN205613037U (en) * 2016-05-03 2016-10-05 温州利幼实业有限公司 Many function combination formula building blocks
KR20180001021U (en) * 2016-10-05 2018-04-13 임익수 assembly type solid education apparatus
CN108244800A (en) * 2018-04-21 2018-07-06 钱伟 A kind of apparatus suitable for foreign language teaching
CN208252995U (en) * 2018-05-15 2018-12-18 温州升望气动工具有限公司 A kind of pneumatic quickly impact gun connector
CN208565710U (en) * 2018-04-09 2019-03-01 佛山市顺德区阿巴特电器有限公司 A kind of wine faucet out quickly connected

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422565A (en) * 1965-01-04 1969-01-21 Lucius H Kentfield Tube,plug and resilient link construction device
CN2068262U (en) * 1990-06-19 1990-12-26 张瑜 Object demonstrating instrument for solid geometry
CN201556319U (en) * 2009-05-15 2010-08-18 邹庆平 Assembled solid geometry demonstration teaching aid
CN205613037U (en) * 2016-05-03 2016-10-05 温州利幼实业有限公司 Many function combination formula building blocks
KR20180001021U (en) * 2016-10-05 2018-04-13 임익수 assembly type solid education apparatus
CN208565710U (en) * 2018-04-09 2019-03-01 佛山市顺德区阿巴特电器有限公司 A kind of wine faucet out quickly connected
CN108244800A (en) * 2018-04-21 2018-07-06 钱伟 A kind of apparatus suitable for foreign language teaching
CN208252995U (en) * 2018-05-15 2018-12-18 温州升望气动工具有限公司 A kind of pneumatic quickly impact gun connector

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