CN107316583A - One kind power supply construction Show board - Google Patents

One kind power supply construction Show board Download PDF

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Publication number
CN107316583A
CN107316583A CN201710642536.7A CN201710642536A CN107316583A CN 107316583 A CN107316583 A CN 107316583A CN 201710642536 A CN201710642536 A CN 201710642536A CN 107316583 A CN107316583 A CN 107316583A
Authority
CN
China
Prior art keywords
half chests
sub
board
block
slot
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.)
Granted
Application number
CN201710642536.7A
Other languages
Chinese (zh)
Other versions
CN107316583B (en
Inventor
李广文
赵广轩
王磊
刘保华
王志国
张建利
王念明
李庆芊
李庆源
刘贞銮
许兆涛
王照玉
张兵
王乃德
李丹
王峰
仝燕萍
温素馨
郑爱东
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.)
State Grid Shandong Electric Power Company Yuncheng Power Supply Co
Original Assignee
State Grid Shandong Electric Power Company Yuncheng Power Supply Co
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 State Grid Shandong Electric Power Company Yuncheng Power Supply Co filed Critical State Grid Shandong Electric Power Company Yuncheng Power Supply Co
Priority to CN201710642536.7A priority Critical patent/CN107316583B/en
Publication of CN107316583A publication Critical patent/CN107316583A/en
Application granted granted Critical
Publication of CN107316583B publication Critical patent/CN107316583B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F15/00Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
    • G09F15/0006Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels
    • G09F15/0012Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels frames therefor
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F15/00Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
    • G09F15/0006Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels
    • G09F15/0018Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels panel clamping or fastening means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Toys (AREA)

Abstract

One kind power supply construction Show board, is related to technical field of electric power construction, carries out the problem of drawing or inconvenient word explanation at the construction field (site) for solution.One kind power supply construction Show board, including the first half chests, the second half chests, four pieces of sub- boards and four pieces of contiguous blocks, the at least two contiguous block holes for being used to intert bolt are respectively provided with each contiguous block, each sub- board is in cuboid respectively, and each sub- board respectively includes four long leptoprosopy and two length and width faces;The length and width face of four pieces of sub- boards is distributed in sphere of movements for the elephants shape, surrounding distribution of each slot along sphere of movements for the elephants shape.Beneficial effect be convenient for carrying, ease of assembly.

Description

One kind power supply construction Show board
Technical field
The present invention relates to technical field of electric power construction, specifically a kind of power supply construction Show board.
Background technology
During construction of powering, it is often necessary to drawing, word or safe drumbeating file are carried out by propaganda board Displaying work.Because power supply construction needs often conversion job location, and propaganda board of the prior art has space-consuming Greatly, it has not been convenient to the problem of being carried, so the displaying work of this drawing, word or the blackout file just constructed to power supply is brought Inconvenience.
The content of the invention
It is an object of the invention to provide one kind power construction Show board, for solve at the construction field (site) carry out drawing or The problem of word explanation is inconvenient.
The technical scheme adopted by the invention to solve the technical problem is that:A kind of power construction Show board, including first At least two are respectively provided with half chests, the second half chests, four pieces of sub- boards and four pieces of contiguous blocks, each contiguous block is used to intert The fast hole of connection of connecting bolt, each sub- board is in cuboid respectively, and each sub- board respectively includes four long Leptoprosopy and two length and width faces;
In any one piece of sub- board, two length and width faces in the sub- board are relative, write positioned at the son An at least length and width face in plate is used to write, and the adjacent long leptoprosopy of two in the board is provided with slot, each to insert Some plate screwed holes are respectively provided with groove, plate screwed hole can coordinate with connecting bolt;
The length and width face of four pieces of sub- boards is distributed in sphere of movements for the elephants shape, each slot surrounding along sphere of movements for the elephants shape point Between cloth, the slot of the adjacent sub- board of any two in the vertical direction, the son that any two is adjacent in the horizontal direction Contiguous block described in one is respectively equipped between the slot of board, contiguous block is plugged in slot, grafting in each fast hole of connection There is connecting bolt, connecting bolt is connected in the plate screwed hole in corresponding slot, and contiguous block is by bolt presses corresponding In slot;
First half chests and the second half chests respectively include an inner chamber for being used to store, first half chests and the second half chests point Not Cheng one end open cuboid, first half chests is externally connected to the first fixture block, and the first fixture block is provided with the first jack, First jack is connected with the inner chamber of the first half chests, and second half chests is externally connected on the second fixture block, second fixture block Provided with the second jack, second jack is connected with the inner chamber of the second half chests, and first fixture block and the second fixture block distinguish grafting In the slot of the lower end positioned at sphere of movements for the elephants shape, be respectively plugged with carrying bolt in the first jack and the second jack, the first fixture block and Second fixture block is pressed in slot by corresponding carrying bolt respectively;
First half chests is provided with some snap rings, and each snap ring includes snap ring hole respectively, and the inserted block can be plugged into institute State in snap ring hole, baffle plate is respectively connected with each inserted block, second half chests is provided with some connecting plates, each connection Connecting plate screwed hole is respectively provided with plate, connecting plate screwed hole can coordinate with the connecting bolt.
Further, each sub- board uses the material of energy adsorption magnet.
Further, it is connected with first handle on first half chests.
Further, it is connected with second handle on second half chests.
Further, first half chests is provided with some storage blocks, each storage block and is respectively equipped with storage block screw thread Hole, storage block screwed hole can coordinate with the carrying bolt.
Further, second half chests is provided with some storage blocks, each storage block and is respectively equipped with storage block screw thread Hole, storage block screwed hole can coordinate with the carrying bolt.
The beneficial effects of the invention are as follows:
1st, a kind of power supply construction Show board that the present invention is provided, when needing to carry out drawing or word exhibition at the construction field (site) When showing, the present invention is subjected to splicing installation in the way of shown in figure, drawing can be fixed on by drawing by adhesive tape etc. On sub- board, so as to realize the displaying work of word drawing and word.
When conversion construction site or transfer displaying place is needed, first by each connecting bolt from plate screwed hole In screw down, each carrying bolt is screwed down from plate screwed hole, and each contiguous block 4 is taken off from slot so that The sub- board of interconnection is split.Then, the inner chamber for each sub- board being put into the first half chests neutralizes the second half chests Inner chamber in.Then, the first half chests and the second half chests are closed in the way of shown in figure.Then, contiguous block is plugged into card In annular distance, connecting bolt is then inserted in contiguous block hole and connecting bolt is screwed into connecting plate screwed hole, so that even Baffle plate is pressed on snap ring by the end of connecting bolt, will realize the first half after each contiguous block installation in this way Relatively closed fixation between case and the second half chests, so as to avoid sub- board when transhipment from dropping.Meanwhile, realizing While closing fixed between one half chests and the second half chests, each contiguous block and each connecting bolt during transhipment are also solved Storage and carry problem, contiguous block and connecting bolt are taken when being also convenient for supporting the present invention next time.To sum up institute State, the present invention has the effect for conveniently supporting, being convenient for carrying.
2nd, each sub- board is using the material of energy adsorption magnet, and this can conveniently be adopted during drawing displaying is carried out Drawing is pressed on sub- board with one or more magnet of absorption on sub- board, so that the convenient exhibition in drawing To the fixation of drawing during showing.
3rd, first handle and second handle can facilitate staff to carry the present invention, better meet power supply and apply The demand of work.
4th, when present invention needs are carried or need to be transferred, carrying bolt is connected on storage block Storage block screwed hole in so that convenient storage and carrying to carrying bolt.
Brief description of the drawings
Fig. 1 is structural representation of the invention;
Fig. 2 is the enlarged drawing of part A in Fig. 1;
Fig. 3 is the structural representation of contiguous block;
Fig. 4 is the structural representation of sub- board;
Fig. 5 is the structural representation of the second half chests;
Fig. 6 is the part B enlarged drawing in Fig. 5;
Fig. 7 is the structural representation of the second half chests;
Fig. 8 be Fig. 7 in C portion enlarged drawing;
Fig. 9 be Fig. 7 in D parts enlarged drawing;
State diagrams of the Figure 10 for the present invention in storage;
In figure:1 first half chests, 11 first fixture blocks, 12 first jacks, 13 snap rings, 14 snap ring holes, 15 first handles, 2 second Half chests, 21 second fixture blocks, 22 second jacks, 23 connecting plates, 24 connecting plate screwed holes, 25 second handles, 26 storage blocks, 27 storages Block screwed hole, 3 sub- boards, 31 long leptoprosopy, 32 length and width faces, 33 slots, 34 plate screwed holes, 4 contiguous blocks, 41 contiguous block holes, 42 Baffle plate, 5 connecting bolts, 6 carrying bolts.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment one:As shown in Figures 1 to 4, the present invention includes the first half chests 1, the second half chests 2, four pieces of sub- boards 3 With four pieces of contiguous blocks 4, at least two contiguous block holes 41, Mei Yizi for being used to intert connecting bolt 5 are respectively provided with each contiguous block 4 Board 3 is in cuboid respectively, and each sub- board 3 respectively includes four long leptoprosopy 31 and two length and width faces 32;Positioned at any one In block board 3, two length and width faces 32 in the sub- board 3 are relative, at least one length in the sub- board 3 Wide face 32 is used to write, and the adjacent long leptoprosopy 31 of two in the board is provided with each in slot 33, each slot 33 Provided with some plate screwed holes 34, plate screwed hole 34 can coordinate with connecting bolt 5, and each sub- board 3 is using energy adsorption magnet Material..
As shown in Figures 1 to 4, the length and width face 32 of four pieces of sub- boards 3 is distributed in sphere of movements for the elephants shape, and each slot 33 is along sphere of movements for the elephants The surrounding distribution of shape, between the slot 33 of the adjacent sub- board 3 of any two in the vertical direction, any two is in level side A contiguous block 4 is respectively equipped between the slot 33 of adjacent sub- board 3 upwards, contiguous block 4 is plugged in slot 33, each connection Connecting bolt 5 is plugged with block hole 41, connecting bolt 5 is connected in the plate screwed hole 34 in corresponding slot 33, contiguous block 4 leads to Bolt presses are crossed in corresponding slot 33.
As shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, the first half chests 1 and the second half chests 2 respectively include one and are used to deposit The inner chamber of storage, the first half chests 1 and the second half chests 2 are in the cuboid of one end open respectively, and the first half chests 1 is externally connected to first Fixture block 11, the first fixture block 11 is provided with the first jack 12, and the first jack 12 is connected with the inner chamber of the first half chests 1, the second half chests 2 The second fixture block 21 is externally connected to, the second fixture block 21 is provided with the inner chamber company of the second jack 22, the second jack 22 and the second half chests 2 Logical, the first fixture block 11 and the second fixture block 21 are plugged in the slot of the lower end of sphere of movements for the elephants shape respectively, the first jack 12 and the Carrying bolt 6 is respectively plugged with two jacks 22, the first fixture block 11 and the second fixture block 21 are compressed by corresponding carrying bolt 6 respectively In slot.First half chests 1 is provided with some snap rings 13, and each snap ring 13 includes snap ring hole 14 respectively, and inserted block can be plugged into card In annular distance 14, baffle plate 42 is respectively connected with each inserted block, the second half chests 2 is provided with some connecting plates 23, each connecting plate 23 On be respectively provided with connecting plate screwed hole 24, connecting plate screwed hole 24 can coordinate with connecting bolt 5.First is connected with first half chests 1 Second handle 25 is connected with handle 15, the second half chests 2.Second half chests 2 is provided with some storage blocks 26, each storage block 26 Storage block screwed hole 27 is respectively equipped with, storage block screwed hole 27 can coordinate with carrying bolt 6.
Embodiment two:
Embodiment two is contrasted with embodiment one, and difference is, the first half chests is provided with some storage blocks, each storage Storage block screwed hole is respectively equipped with block, storage block screwed hole can coordinate with carrying bolt, no longer embodiment two is carried out herein Detailed brief description of the drawings.
As shown in Figures 1 to 9, when needing to carry out drawing or word displaying at the construction field (site), the present invention is pressed Splicing installation is carried out according to the mode shown in Fig. 1, drawing can be fixed on sub- board 3 by drawing by adhesive tape etc., so that real The displaying work of existing word drawing and word.
As shown in Fig. 2 to Figure 10, when conversion construction site or transfer displaying place is needed, each is connected first Connecting bolt 5 is screwed down from plate screwed hole 34, and each carrying bolt 6 is screwed down from plate screwed hole, and by each contiguous block 4 Taken off from slot 33, so that the sub- board 3 of interconnection be split.Then, each sub- board 3 is put into first The inner chamber of half chests 1 is neutralized in the inner chamber of the second half chests 2.Then, by the first half chests 1 and the second half chests 2 according to the side shown in Figure 10 Formula is closed.Then, contiguous block 4 is plugged into snap ring hole 14, connecting bolt 5 is then inserted in contiguous block hole 41 and will be connected Bolt 5 is screwed into connecting plate screwed hole 24, so that baffle plate 42 is pressed on snap ring 13 by the end of connecting bolt 5, is passed through This mode will realize the relatively closed fixation between the first half chests 1 and the second half chests 2 after each contiguous block installation, from And avoid sub- board when transhipment from dropping.Meanwhile, fixation is closed between the first half chests 1 and the second half chests 2 realizing Meanwhile, the storage and carrying of each contiguous block 4 and each connecting bolt 5 during transhipment are also solved the problems, such as, under being also convenient for Contiguous block 4 and connecting bolt 5 are taken when once the present invention is supported.In summary, the present invention has convenient support, conveniently The effect of carrying.
As shown in Figures 1 to 10, each sub- board 3 is using the material of energy adsorption magnet, and this is carrying out the mistake of drawing displaying Drawing, conveniently can be pressed on sub- board by Cheng Zhong using one or more magnet of absorption on sub- board, from And the convenient fixation during the displaying of drawing to drawing.First handle and second handle can facilitate staff to this Invention is carried, and better meets the demand of power supply construction.When present invention needs are carried or need to be transferred, Carrying bolt 6 is connected in the storage block screwed hole 27 on storage block 26, thus convenient storage to carrying bolt and Carry.

Claims (6)

1. one kind power supply construction Show board, it is characterized in that, including the first half chests, the second half chests, four pieces of sub- boards and four pieces At least two contiguous block holes for being used to intert bolt, each sub- board are respectively provided with contiguous block, each contiguous block It is in cuboid respectively, each sub- board respectively includes four long leptoprosopy and two length and width faces;
In any one piece of sub- board, two length and width faces in the sub- board are relative, in the sub- board An at least length and width face be used to write, the adjacent long leptoprosopy of two in the board is provided with slot, in each slot Some plate screwed holes are respectively provided with, plate screwed hole can coordinate with connecting bolt;
The length and width face of four pieces of sub- boards is distributed in sphere of movements for the elephants shape, surrounding distribution of each slot along sphere of movements for the elephants shape, appoints Anticipate between the slot of the adjacent sub- board of two in the vertical directions, the sub- board that any two is adjacent in the horizontal direction Slot between be respectively equipped with contiguous block described in one, contiguous block is plugged in slot, and connection is plugged with each contiguous block hole Bolt, connecting bolt is connected in the plate screwed hole in corresponding slot, and contiguous block is by bolt presses in corresponding slot;
First half chests and the second half chests respectively include an inner chamber for being used to store, and first half chests and the second half chests are in respectively The cuboid of one end open, first half chests is externally connected to the first fixture block, and the first fixture block is provided with the first jack, first Jack is connected with the inner chamber of the first half chests, and second half chests is externally connected to the second fixture block, and second fixture block is provided with Second jack, second jack is connected with the inner chamber of the second half chests, and the first fixture block and the second fixture block the difference grafting is in place In the slot of the lower end of sphere of movements for the elephants shape, carrying bolt, the first fixture block and second are respectively plugged with the first jack and the second jack Fixture block is pressed in slot by corresponding carrying bolt respectively;
First half chests is provided with some snap rings, and each snap ring includes snap ring hole respectively, and the inserted block can be plugged into the card In annular distance, baffle plate is respectively connected with each inserted block, second half chests is provided with some connecting plates, each connecting plate Connecting plate screwed hole is respectively provided with, connecting plate screwed hole can coordinate with the connecting bolt.
2. a kind of power supply construction Show board according to claim 1, it is characterized in that, each sub- board use can inhale The material of attached magnet.
3. a kind of power supply construction Show board according to claim 1, it is characterized in that, the is connected with first half chests One handle.
4. a kind of power supply construction Show board according to claim 1, it is characterized in that, the is connected with second half chests Two handles.
5. a kind of power supply construction Show board according to claim 1, it is characterized in that, first half chests is provided with some Storage block, be respectively equipped with storage block screwed hole on each storage block, storage block screwed hole can coordinate with the carrying bolt.
6. a kind of power supply construction Show board according to claim 1, it is characterized in that, second half chests is provided with some Storage block, be respectively equipped with storage block screwed hole on each storage block, storage block screwed hole can coordinate with the carrying bolt.
CN201710642536.7A 2017-07-31 2017-07-31 Display fence for power supply construction Active CN107316583B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710642536.7A CN107316583B (en) 2017-07-31 2017-07-31 Display fence for power supply construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710642536.7A CN107316583B (en) 2017-07-31 2017-07-31 Display fence for power supply construction

Publications (2)

Publication Number Publication Date
CN107316583A true CN107316583A (en) 2017-11-03
CN107316583B CN107316583B (en) 2023-08-22

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Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW370819U (en) * 1998-01-23 1999-09-21 Yu-Shu Chen Structure of knock down desk
CN2464163Y (en) * 2001-01-04 2001-12-12 侯廷政 Assembling type cinerary cabinet
CN201853441U (en) * 2010-09-19 2011-06-01 Tcl新技术(惠州)有限公司 Spliced curtain wall of liquid crystal display
CN202439416U (en) * 2012-01-19 2012-09-19 黄锦超 Portable wordpad for teaching
CN202533400U (en) * 2012-04-23 2012-11-14 北京首瑞大同测控技术有限公司 Automatic detector of concrete early-age cracks
US20130279090A1 (en) * 2012-03-05 2013-10-24 Thomas Brandt Transportable deployable display apparatus
CN203982709U (en) * 2014-06-06 2014-12-03 深圳市奥蕾达科技有限公司 Display screen containing case and splicing casing thereof
CN204015392U (en) * 2014-06-13 2014-12-17 宁波大学科学技术学院 Prop set mould assembling
JP2015009084A (en) * 2013-07-02 2015-01-19 有限会社東京インテリア・クラフト General-purpose support block and general-purpose support unit
CN105702182A (en) * 2016-03-18 2016-06-22 深圳三不传媒科技有限公司 Display rack
CN205810282U (en) * 2016-07-19 2016-12-14 天津泰德恒信科技发展有限公司 3D stereo big screen display device
CN205895115U (en) * 2016-06-17 2017-01-18 新昌万顺机械有限公司 Ladder that conveniently carries
CN205971417U (en) * 2016-07-25 2017-02-22 深圳市雷迪奥视觉技术有限公司 LED display screen transport trolley structure convenient to promote show
CN206075784U (en) * 2016-09-10 2017-04-05 深圳市新动力展览设计有限公司 Portable exhibition frame
CN206363596U (en) * 2016-12-14 2017-07-28 闫利 A kind of Multifunctional English teaching demonstration device
CN207233342U (en) * 2017-07-31 2018-04-13 国网山东省电力公司郓城县供电公司 One kind power supply construction Show board

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW370819U (en) * 1998-01-23 1999-09-21 Yu-Shu Chen Structure of knock down desk
CN2464163Y (en) * 2001-01-04 2001-12-12 侯廷政 Assembling type cinerary cabinet
CN201853441U (en) * 2010-09-19 2011-06-01 Tcl新技术(惠州)有限公司 Spliced curtain wall of liquid crystal display
CN202439416U (en) * 2012-01-19 2012-09-19 黄锦超 Portable wordpad for teaching
US20130279090A1 (en) * 2012-03-05 2013-10-24 Thomas Brandt Transportable deployable display apparatus
CN202533400U (en) * 2012-04-23 2012-11-14 北京首瑞大同测控技术有限公司 Automatic detector of concrete early-age cracks
JP2015009084A (en) * 2013-07-02 2015-01-19 有限会社東京インテリア・クラフト General-purpose support block and general-purpose support unit
CN203982709U (en) * 2014-06-06 2014-12-03 深圳市奥蕾达科技有限公司 Display screen containing case and splicing casing thereof
CN204015392U (en) * 2014-06-13 2014-12-17 宁波大学科学技术学院 Prop set mould assembling
CN105702182A (en) * 2016-03-18 2016-06-22 深圳三不传媒科技有限公司 Display rack
CN205895115U (en) * 2016-06-17 2017-01-18 新昌万顺机械有限公司 Ladder that conveniently carries
CN205810282U (en) * 2016-07-19 2016-12-14 天津泰德恒信科技发展有限公司 3D stereo big screen display device
CN205971417U (en) * 2016-07-25 2017-02-22 深圳市雷迪奥视觉技术有限公司 LED display screen transport trolley structure convenient to promote show
CN206075784U (en) * 2016-09-10 2017-04-05 深圳市新动力展览设计有限公司 Portable exhibition frame
CN206363596U (en) * 2016-12-14 2017-07-28 闫利 A kind of Multifunctional English teaching demonstration device
CN207233342U (en) * 2017-07-31 2018-04-13 国网山东省电力公司郓城县供电公司 One kind power supply construction Show board

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