CN109555938B - Mechanical broadcasting equipment convenient to install and detach - Google Patents
Mechanical broadcasting equipment convenient to install and detach Download PDFInfo
- Publication number
- CN109555938B CN109555938B CN201811449795.9A CN201811449795A CN109555938B CN 109555938 B CN109555938 B CN 109555938B CN 201811449795 A CN201811449795 A CN 201811449795A CN 109555938 B CN109555938 B CN 109555938B
- Authority
- CN
- China
- Prior art keywords
- broadcasting
- groove
- compression spring
- bottom plate
- frame
- 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.)
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Links
- 238000009434 installation Methods 0.000 claims abstract description 53
- 230000006835 compression Effects 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 29
- 230000008439 repair process Effects 0.000 claims abstract description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000003139 buffering effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/041—Allowing quick release of the apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
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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
- G09B5/00—Electrically-operated educational appliances
- G09B5/04—Electrically-operated educational appliances with audible presentation of the material to be studied
Abstract
The invention discloses a mechanical broadcasting device convenient to install and disassemble, which belongs to the field of English broadcasting, and comprises an installation frame, wherein the installation frame is fixedly connected with a wall surface through a structure such as a screw, an installation groove is cut into the installation frame, a pair of positioning columns are connected to a groove bottom plate of the installation groove, one end of the positioning column, which is far away from the groove bottom plate of the installation groove, is connected with a limiting disc, a push plate is sleeved on the positioning columns, a compression spring is connected between the push plate and the groove bottom plate of the installation groove, the compression spring is sleeved on the positioning columns, a broadcasting body is arranged in the installation groove, a pair of buckles are connected between the installation frame and the broadcasting body, the buckles are fixedly connected with the installation frame, the broadcasting body and the installation frame are connected through a pair of buckles, and a positioning groove matched with the limiting disc is cut into the broadcasting body, so that the disassembly, maintenance and repair of English broadcasting for students can be conveniently realized, and normal English teaching of students are not easily influenced.
Description
Technical Field
The invention relates to the field of English broadcasting, in particular to mechanical broadcasting equipment convenient to install and detach.
Background
In the english teaching examination of junior high school, often will use the hearing broadcast to carry out the broadcast of listening test, compare in the hearing earphone that university student used in english examination, in the junior high school that examination frequency is comparatively frequent, the hearing broadcast is more practical, and the student need not to worry the working condition of earphone, can put energy on the examination completely.
The existing hearing broadcast is often hung on a corner wall of a classroom, so that the normal life of students is not affected, the hearing broadcast is often hung at a higher position by using a mounting bracket, and once the hearing broadcast fails, the hearing broadcast is relatively troublesome to detach, maintain and repair, and the normal English teaching of the students is easily affected.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide the mechanical broadcasting equipment which is convenient to mount and dismount, can realize the dismounting, the maintenance and the repair of English broadcasting and is not easy to influence the normal English teaching of students.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The utility model provides a machinery broadcasting equipment convenient to install and dismantlement, includes the installing frame, installing frame passes through structure such as screw and wall fixed connection, the cutting has the mounting groove in the installing frame, be connected with a pair of reference column on the tank bottom plate of mounting groove, the one end that the tank bottom plate of mounting groove was kept away from to the reference column is connected with spacing dish, the push pedal has been cup jointed on the reference column, be connected with compression spring between the tank bottom plate of push pedal and mounting groove, and compression spring cup joints on the reference column, be equipped with broadcasting body in the mounting groove, be connected with a pair of buckle between installing frame and the broadcasting body, and buckle and installing frame fixed connection, through a pair of buckle connection between broadcasting body and the installing frame, the cutting has the constant head tank with spacing dish assorted, can realize convenient english broadcasting's dismantlement, maintenance and repair, be difficult for influencing normal english teaching, be connected with the buffering rubber pad between the tank bottom plate of mounting groove and the broadcasting body, and buffering rubber pad and the tank bottom plate fixed connection of mounting groove, the cutting has the through-hole that can reduce with compression spring phase-matched installation through-hole and the installation frame can not influence the vibration of installing frame when the broadcasting rubber pad is easy to produce the installation.
Further, the cavity is formed in the buffer rubber pad, a large number of elastic balls are filled in the cavity, the elasticity of the buffer rubber pad can be greatly increased through the cavity and the elastic balls, the damping performance of the buffer rubber pad can be effectively increased, and the connection between the installation frame and the wall is not easy to relax.
Further, the anti-falling groove is cut on the broadcasting body, the anti-falling post is connected in the anti-falling groove, the elastic rope is connected to the installation frame, one end of the elastic rope, far away from the installation frame, is connected with the anti-falling ring buckle, and when the broadcasting body is detached, the broadcasting body can be prevented from being directly popped out of the installation groove through the anti-falling ring buckle on the anti-falling post, so that the broadcasting body is prevented from being damaged easily, and workers below the installation frame are prevented from being injured easily.
Further, the elastic reel groove is cut on the installation frame, the elastic reel is connected in the elastic reel groove, one end of the elastic rope, which is far away from the anti-falling ring buckle, penetrates through the installation frame and is wound on the elastic reel, and when the anti-falling ring buckle does not need to be used, the elastic reel can retract the elastic rope, so that the elastic rope is not easy to become messy or tie a knot, and the normal use of the anti-falling ring buckle is not easy to be influenced.
Further, the outside of reference column, spacing dish, push pedal and compression spring all scribbles corrosion-resistant layer, makes reference column, spacing dish, push pedal and compression spring be difficult for inefficacy because of corrosion, is difficult for influencing the normal installation and the dismantlement of broadcasting body.
Further, the outside of elastic rope is wrapped up in thin rubber sleeve, be equipped with the wearing layer on the thin rubber sleeve, thin rubber sleeve and wearing layer can protect the elastic rope, make the elastic rope be difficult for wearing out in the use, are difficult for influencing the safety in utilization of anti-falling ring knot.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) The scheme can realize convenient disassembly, maintenance and repair of English broadcasting, and is not easy to influence the normal English teaching of students.
(2) The buffer rubber pad is connected between the bottom plate of the installation groove and the broadcasting body, and is fixedly connected with the bottom plate of the installation groove, the buffer rubber pad is provided with an installation through hole matched with the compression spring, and the buffer rubber pad can reduce the influence of vibration generated during the operation of the broadcasting body on the installation frame, so that the connection between the installation frame and the wall is not easy to relax.
(3) The buffering rubber pad is internally provided with the cavity, a large number of elastic balls are filled in the cavity, the elasticity of the buffering rubber pad can be greatly increased through the cavity and the elastic balls, the damping performance of the buffering rubber pad can be effectively increased, and the connection between the installation frame and the wall is not easy to relax.
(4) The broadcast body is provided with the anti-falling groove, the anti-falling groove is connected with the anti-falling post, the installation frame is connected with the elastic rope, one end of the elastic rope, which is far away from the installation frame, is connected with the anti-falling ring buckle, and when the broadcast body is disassembled, the broadcast body can be directly ejected from the installation groove through the anti-falling ring buckle on the anti-falling post, so that the broadcast body is not easy to break, and workers below the installation frame are not easy to be injured.
(5) The elastic reel groove is cut on the installation frame, the elastic reel is connected in the elastic reel groove, one end of the elastic rope, which is far away from the anti-falling ring buckle, penetrates through the installation frame and is wound on the elastic reel, and when the anti-falling ring buckle does not need to be used, the elastic reel can retract the elastic rope, so that the elastic rope is not easy to become messy or tie a knot, and the normal use of the anti-falling ring buckle is not easy to be influenced.
(6) The outside of reference column, spacing dish, push pedal and compression spring all scribbles corrosion-resistant layer, makes reference column, spacing dish, push pedal and compression spring be difficult for inefficacy because of corrosion, is difficult for influencing the normal installation and the dismantlement of broadcasting body.
(7) The outside of elastic rope is wrapped up in thin rubber sleeve, is equipped with the wearing layer on the thin rubber sleeve, and thin rubber sleeve and wearing layer can protect the elastic rope, make the elastic rope be difficult for wearing out in the use, are difficult for influencing the safety in utilization of anti-falling ring knot.
Drawings
FIG. 1 is a front cross-sectional view of the invention in normal operation;
FIG. 2 is a schematic diagram of the structure at A in FIG. 1;
FIG. 3 is a front cross-sectional view of the present invention in disassembly;
fig. 4 is a schematic diagram of the structure at B in fig. 3.
The reference numerals in the figures illustrate:
1 mounting frame, 2 mounting groove, 3 broadcasting body, 4 reference column, 5 spacing dish, 6 push pedal, 7 compression spring, 8 constant head tank, 9 buffering rubber pad, 10 installation through-hole, 11 elasticity ball, 12 anti-falling post, 13 elasticity spool, 14 elasticity rope, 15 anti-falling buckle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
referring to fig. 1-4, a mechanical broadcasting device convenient to install and detach, including installing frame 1, installing frame 1 passes through structure such as screw and wall fixed connection, install 1 internally cutting has mounting groove 2, install 1 and mounting groove 2 are the installation base of broadcasting body 3, be connected with a pair of reference column 4 on the bottom plate of mounting groove 2, can be fast positioned when broadcasting body 3 installs through the matching of reference column 4 and constant head tank 8, the one end that the bottom plate of mounting groove 2 was kept away from to reference column 4 is connected with spacing dish 5, spacing dish 5 can restrict the gliding position of push pedal 6, make push pedal 6 be difficult for follow spacing dish 5 and slip, cup joint push pedal 6 on the reference column 4, be connected with compression spring 7 between push pedal 6 and the bottom plate of mounting groove 2, and compression spring 7 cup joints on reference column 4, compression spring 7 that is in compression state can make push pedal 6 and broadcasting body 3 have the trend of the motion of keeping away from the bottom plate of mounting groove 2 all the time, make things convenient for the staff to dismantle broadcasting body 3, be equipped with broadcasting body 3 in mounting groove 2, be connected with between buckle 1 and 3 and the buckle, and be connected with a pair of buckle 1 and 3 through fixing clip 1 and 3 on the spacing dish 3, be connected with 3 through fixing clip 1 and spacing dish 3.
Referring to fig. 1 or 3, a buffer rubber pad 9 is connected between the bottom plate of the installation groove 2 and the broadcast body 3, and the buffer rubber pad 9 is fixedly connected with the bottom plate of the installation groove 2, an installation through hole 10 matched with the compression spring 7 is cut on the buffer rubber pad 9, the buffer rubber pad 9 can reduce the influence of vibration generated during operation of the broadcast body 3 on the installation frame 1, the connection between the installation frame 1 and a wall is not easy to relax, a cavity is cut in the buffer rubber pad 9, a large number of elastic balls 11 are filled in the cavity, the elasticity of the buffer rubber pad 9 can be greatly increased by the cavity and the elastic balls 11, the shock absorption performance of the buffer rubber pad 9 can be effectively increased, and the connection between the installation frame 1 and the wall is not easy to relax.
Referring to fig. 2 or 4, an anti-falling groove is cut on the broadcasting body 3, an anti-falling post 12 is connected in the anti-falling groove, an elastic rope 14 is connected on the installation frame 1, one end of the elastic rope 14 away from the installation frame 1 is connected with an anti-falling ring 15, when the broadcasting body 3 is disassembled, the broadcasting body 3 can not be easily popped out of the installation groove 2 by buckling the anti-falling ring 15 on the anti-falling post 12, the broadcasting body 3 is not easily broken, workers below the installation frame 1 are not easily injured, an elastic reel groove is cut on the installation frame 1, an elastic reel 13 is connected in the elastic reel groove, one end of the elastic rope 14 away from the anti-falling ring 15 penetrates through the installation frame 1 and is wound on the elastic reel 13, and when the anti-falling ring 15 is not needed, the elastic reel 13 can retract the elastic rope 14, so that the elastic rope 14 is not easily messy or knotted, and the normal use of the anti-falling ring 15 is not easily affected.
The outside of reference column 4, spacing dish 5, push pedal 6 and compression spring 7 all scribbles corrosion-resistant layer, makes reference column 4, spacing dish 5, push pedal 6 and compression spring 7 be difficult for inefficacy because of corrosion, is difficult for influencing the normal installation and the dismantlement of broadcasting body 3, and the outside of elastic rope 14 is wrapped up in and is had thin rubber sleeve, is equipped with the wearing layer on the thin rubber sleeve, and thin rubber sleeve and wearing layer can protect elastic rope 14, makes elastic rope 14 be difficult for wearing off in the use, is difficult for influencing the safety in utilization of anti-falling ring buckle 15.
When the broadcasting body 3 is normally used, please refer to fig. 1, when the broadcasting body 3 breaks down and needs to be maintained and repaired, please refer to fig. 4, the anti-falling ring buckle 15 is hung on the anti-falling post 12, a pair of buckles are loosened, at the moment, under the action of the compression spring 7 in a compressed state, the push plate 6 and the broadcasting body 3 can be pushed away towards the direction away from the groove bottom plate of the mounting groove 2 until the broadcasting body 3 is changed into the state shown in fig. 3, at the moment, under the action of the elastic rope 14 and the anti-falling ring buckle 15, the broadcasting body 3 is not easy to fall down directly from the mounting frame 1, the broadcasting body 3 is not easy to damage or crush staff, the anti-falling ring buckle 15 is loosened, the broadcasting body 3 is taken out from the mounting groove 2 for maintenance and repair, when the broadcasting body 3 cannot be repaired, the new broadcasting body 3 can be directly replaced, the repaired or the new broadcasting body 3 is put back into the mounting groove 2, the anti-falling ring buckle 15 is buckled on the anti-falling post 12 again, the broadcasting body 3 is not easy to appear in the mounting process, the positioning groove 8 is aligned with the limiting disc 5, the broadcasting body 3 is pushed to the position of the broadcasting body 3 is not easy to affect the shown in the mounting groove 1, and the English teaching is convenient to realize, and the maintenance is convenient, the broadcasting is convenient, and easy to realize, and the maintenance and the English is convenient to realize.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (1)
1. The utility model provides a machinery broadcasting equipment convenient to install and dismantlement, includes mounting frame (1), mounting frame (1) passes through screw and wall fixed connection, its characterized in that: the utility model discloses a novel broadcasting device, including installation frame (1), install frame (2) internally cutting has mounting groove (2), be connected with a pair of reference column (4) on the bottom plate of groove of mounting groove (2), one end that reference column (4) kept away from the bottom plate of mounting groove (2) is connected with spacing dish (5), cup jointed push pedal (6) on reference column (4), be connected with compression spring (7) between the bottom plate of push pedal (6) and mounting groove (2), and compression spring (7) cup joint on reference column (4), be equipped with broadcasting body (3) in mounting groove (2), be connected with a pair of buckle between installation frame (1) and broadcasting body (3), be connected through a pair of buckle between broadcasting body (3) and the mounting frame (1), cut out on broadcasting body (3) have with spacing dish (5) assorted constant head tank (8), be connected with buffer pad (9) between bottom plate and the broadcasting body (3), and the bottom plate of mounting groove (2) and the buffer pad (9) are connected with the compression pad (9) fixedly cutting a pair of through-holes, the buffer pad (9) are connected with compression pad (10) on the bottom plate (9), the utility model discloses a broadcasting system, including broadcasting body, compression spring (7), locating column (4), locating disc (5), push pedal (6) and compression spring (7), install frame (1) and be connected with elastic cord (14) in the cavity intussuseption have a large amount of elasticity balls (11), the broadcast body (3) is gone up to open, be connected with anti-falling ring (15) on anti-falling groove, open on installing frame (1) has elasticity spool groove, elasticity spool inslot connection has elasticity spool (13), the one end that anti-falling ring (15) was kept away from to elastic cord (14) runs through installing frame (1) and twines on elasticity spool (13), the outside of locating column (4), locating disc (5), push pedal (6) and compression spring (7) is all scribbled corrosion-resistant layer, the outside of elastic cord (14) is wrapped up in thin rubber sleeve, be equipped with the wearing layer on the thin rubber sleeve, when broadcasting body breaks down and need repair, hang anti-falling ring on anti-falling column, loosen the compression spring in the effect of a pair of buckle under compression state and go towards the installation groove of the compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449795.9A CN109555938B (en) | 2018-11-30 | 2018-11-30 | Mechanical broadcasting equipment convenient to install and detach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449795.9A CN109555938B (en) | 2018-11-30 | 2018-11-30 | Mechanical broadcasting equipment convenient to install and detach |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109555938A CN109555938A (en) | 2019-04-02 |
| CN109555938B true CN109555938B (en) | 2024-03-19 |
Family
ID=65868071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811449795.9A Active CN109555938B (en) | 2018-11-30 | 2018-11-30 | Mechanical broadcasting equipment convenient to install and detach |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109555938B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268179A (en) * | 2020-10-23 | 2021-01-26 | 湖南超川电子科技有限公司 | Installation assembly for industrial automatic control instrument system driver |
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| CN208138814U (en) * | 2018-04-26 | 2018-11-23 | 陈书画 | A kind of power equipment vibration isolation mounting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6554262B2 (en) * | 2001-08-23 | 2003-04-29 | Lockheed Martin Corporation | Wall mounted display |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204588636U (en) * | 2015-03-20 | 2015-08-26 | 四川宏华石油设备有限公司 | A kind of novel blowout preventer maintenance operation system |
| CN106015883A (en) * | 2016-07-29 | 2016-10-12 | 国网山东省电力公司蓬莱市供电公司 | Multifunctional power instrument support |
| CN205857909U (en) * | 2016-07-30 | 2017-01-04 | 平庆义 | A kind of architectural engineering protection network |
| CN206904145U (en) * | 2017-05-09 | 2018-01-19 | 舞钢市保华科技有限公司 | A kind of damping noise reduction fixing device for on-vehicle night vision instrument |
| CN208090256U (en) * | 2018-03-21 | 2018-11-13 | 袁园 | A kind of information monitoring equipment being easily installed |
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| Publication number | Publication date |
|---|---|
| CN109555938A (en) | 2019-04-02 |
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