CN111101670A - Adjustable connection structure for spool fixing keel - Google Patents
Adjustable connection structure for spool fixing keel Download PDFInfo
- Publication number
- CN111101670A CN111101670A CN201811258337.7A CN201811258337A CN111101670A CN 111101670 A CN111101670 A CN 111101670A CN 201811258337 A CN201811258337 A CN 201811258337A CN 111101670 A CN111101670 A CN 111101670A
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- keel
- plate
- vertical
- fixing
- box
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/0889—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements characterised by the joints between neighbouring elements, e.g. with joint fillings or with tongue and groove connections
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides an adjustable conduit fixing keel connecting structure, which comprises: fossil fragments connection structure, line box fossil fragments and spool mounting, fossil fragments connection structure includes: the T-shaped keel connecting structure is formed by clamping one ends of the two vertical keels on the bulges of the transverse keels; the wire box keel is an I-shaped keel, and the wire box keel is fixedly and vertically connected with the two vertical keels through the vertical bending plate; the wire pipe fixing part comprises a first plate and a second plate; the first plate is fixedly connected with the second plate; the spool mounting is connected with the vertical keel in a clamping manner through the clamping portion of the spool mounting. According to the technical scheme, the keel connecting structure which is rapid to install and convenient to detach and replace can be realized, the construction efficiency is improved, the construction period is effectively shortened, the position of the wire pipe fixing piece is rapidly adjusted according to the length of the constructed wire pipe, and the light steel structure is attached to the maximum extent.
Description
Technical Field
The invention relates to the technical field of building keel connection, in particular to an adjustable connection structure for a wire pipe fixing keel.
Background
In a building construction site, the problem that engineering constructors feel headache is always caused by the fact that the wire pipes on the wall are buried and fixed, and the method generally comprises the following steps: grooving according to spool diameter on the wall body, it is hidden to plaster after laying and finishing, often the hollowing appears when plastering, later stage production crack drops even, seriously influence the quality of plastering, need the later stage to take measures to repair, both influence the engineering quality, increase the input cost again, the installation in light steel construction of way in addition, at present, electric spool obviously applies the installation way all kinds in light steel construction wall body, it is not unified, the way mainly is that fixed ferrule realizes on the wall body directly, this upper way, on the one hand, the quantity of nailing is too many when fixing the spool, and destroy wall structure, on the other hand, do not have the characteristics of fine combination light steel construction, furthest depends on light steel construction.
Disclosure of Invention
The present invention is directed to solving the problems described above. It is an object of the present invention to provide an adjustable conduit-fixing keel connection which solves any of the above problems. Specifically, the invention does not need to open a groove on the wall body, can prevent the wall body from generating cracks or fissures, depends on the light steel structure to the maximum extent, solves the problem of the installation of the electric pipeline in the wall body on the light steel structure, and realizes the keel connecting structure which has no hydration construction, quick installation and convenient disassembly and replacement.
According to a first aspect of the present invention, there is provided an adjustable conduit fixing keel connection structure, comprising: fossil fragments connection structure, line box fossil fragments and spool mounting, fossil fragments connection structure includes: the steel plate comprises a transverse keel and two vertical keels, wherein the transverse keel is a U-shaped keel, a plurality of protrusions are arranged at symmetrical positions on two flanges of the transverse keel, any one of the two vertical keels is a C-shaped keel, a plurality of holes are formed in a web plate of each vertical keel, and one end of each vertical keel is clamped on the protrusion of the transverse keel to form a T-shaped connecting structure; the wire box keel is an I-shaped keel, the wire box keel comprises two side plates and a plurality of line box grooves, the two side plates are symmetrically provided with a plurality of first wire tube holes, two ends of each side plate are provided with vertical bending plates, and the wire box keel is fixedly and vertically connected with the two vertical keels through the vertical bending plates; the wire tube fixing piece comprises a first plate and a second plate, the first plate is fixedly connected with the second plate, the first plate is provided with a wire tube hole, and the middle end of the second plate is provided with a clamping part; the spool fixing piece passes through joint portion the centre keel joint.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
any one of the trunk line box grooves comprises two supporting plates and a bottom plate, a plurality of second line pipe holes are symmetrically formed in the main body of each supporting plate, a line box fixing piece is arranged on one side of each supporting plate, and a plurality of third line pipe holes are formed in the bottom plate.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
the C-shaped buckling plates are arranged at positions corresponding to the holes in the web plate of the vertical keel and comprise a ridge plate and two bending plates which are formed by vertically bending the two sides of the ridge plate in the same direction, and the two bending plates are fixedly connected with the edges of the corresponding holes in the web plate of the vertical keel.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
the clamping part is an L-shaped plate.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
the clamping portion is a V-shaped bulge, and two ends of the clamping portion form an E-shaped structure.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
and a plurality of through holes are formed in the symmetrical positions of the two flanges of the two vertical keels.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
the width of two curb plates of line box fossil fragments equals the width in hole on the web of two perpendicular fossil fragments.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
the junction box is characterized in that a junction box fixing piece is arranged on one side of the supporting plate of the junction box keel, and the junction box fixing piece is an oval or circular junction box fixing piece.
The adjustable connection structure of the conduit fixing keel further has the following characteristics:
the plurality of bulges arranged on the two flanges of the transverse keel are of semi-cylindrical structures.
The adjustable type keel connecting structure for fixing the spool can realize the keel connecting structure which is rapid to install and convenient to detach and replace, is simple in structure, economical and practical, does not need to be grooved on a wall body, realizes the installation of an electric wire and a wire box, reduces environmental pollution, reduces labor intensity, effectively saves manpower and material resources, greatly improves construction efficiency, shortens construction period, can adjust the position of a spool fixing part according to the length of a construction spool, is rapid and convenient in fixing mode, and depends on a light steel structure to the maximum extent.
Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic structural view schematically illustrating an adjustable conduit fixing keel connecting structure according to the invention;
FIG. 2 shows an enlarged view of section A of FIG. 1;
figure 3 shows a schematic view of the construction of the box keel of figure 1;
figure 4 shows an exemplary structural view of a conduit fixing;
figure 5 shows schematically another construction of a conduit fixing;
fig. 6 exemplarily shows a left side view of another structure of the conduit fixing member;
figure 7 shows an exemplary configuration of the conduit retainer snap-fit engagement with the furring channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The invention adds a plurality of line box grooves in the line box keel, arranges a plurality of line pipe holes in the line box keel, adds a line pipe fixing piece in the keel connecting structure, orderly fixes the line box and the circuit in the building by utilizing the preset line box grooves and the line pipe holes, and further matches with a plurality of line pipe holes of the line box groove for use by adjusting the position of the line pipe fixing piece clamped with the vertical keel so as to fix the complex line in construction. The adjustable connection structure of the wire pipe fixing keel can realize the construction of the electric wire and the wire box without wall surface grooving and external hanging lines on the installation site, can randomly replace the clamping position of the wire pipe fixing piece on the vertical keel according to the construction condition, and effectively shortens the construction period; carry out the mounting means that the card was established through horizontal fossil fragments and vertical keel, make things convenient for vertical keel position to adjust after the concatenation, fossil fragments connection structure easy dismounting has improved the efficiency of construction moreover.
The following describes the adjustable conduit fixing keel connecting structure according to the invention in detail with reference to the accompanying drawings.
Fig. 1 shows a back structure schematic diagram of an embodiment of the sliding adjustment type decorative plate dry hanging installation structure, fig. 2 is an enlarged view of a part a in fig. 1, fig. 3 shows a structure schematic diagram of a specific embodiment of a keel of a wire box in fig. 1, and fig. 4 shows a structure schematic diagram of a specific embodiment of a wire tube fixing member 3. It shows to synthesize and refer to fig. 1-4, this adjustable spool fixed keel connection structure includes fossil fragments connection structure 1, line box fossil fragments 2 and spool mounting 3, and fossil fragments connection structure includes: horizontal fossil fragments 11 and two vertical keel 12, horizontal fossil fragments 11 are U type fossil fragments, and vertical keel 12 joint forms T font fossil fragments connection structure 1 on horizontal fossil fragments, line box fossil fragments 2 and vertical keel 12 vertical fixation are connected, spool mounting 3 and vertical keel 12 joint.
In this embodiment, the symmetrical positions on the two flanges of the cross keel 11 are both provided with a plurality of protrusions 111, so that one end of each of the two vertical keels 12 is clamped on the protrusion 111 of the cross keel 11 to form a T-shaped connecting structure, the number of the protrusions of the cross keel can be arbitrarily set according to the length of the cross keel used in actual use on site, and the cross keel can be fixedly connected with at least two vertical keels, specifically, the distance d between two adjacent protrusions of the cross keel, the width of the web of the cross keel are set to l, the width b of the web of the vertical keel and the width a of the flange of the vertical keel can be arbitrarily customized according to the requirements in building construction, but in the manufacturing process, d is equal to a, l is equal to b, so that one end of each vertical keel 12 can be clamped between the adjacent protrusions 111 of the cross keel 11 to form a T-shaped fixing structure, convenient operation, and easily adjust, a plurality of archs of cross keel can set up in the horizontal intermediate position department in the edge of a wing, also can set up in the position that is close to edge of a wing edge to can be good with the fixed firm of vertical keel, other structures such as protruding 111 shape can be for the rectangle, in this embodiment, protruding 111 is the semi-cylindrical structure, in order to reduce vertical keel and with the resistance that cross keel card was established.
Furthermore, a plurality of through holes 123 can be symmetrically arranged on two flanges of the two vertical keels 12, and the size of the through holes 123 is adapted to the size of the protrusions 111 of the transverse keels, so that the protrusions 111 of the transverse keels are just clamped on the through holes 123 of the flanges of the vertical keels to form a T-shaped connecting structure.
Any one of two vertical keels 12 is C type fossil fragments, the web of vertical keel 12 sets up a plurality of hole 121, can also be equipped with a plurality of C type snap-in boards 122 in the position that corresponds with a plurality of hole 121 on the web of vertical keel, refer to fig. 2 and show, C type snap-in board 122 includes backbone 1221 and two boards 1222 of bending of formation with the same direction vertical bending of backbone both sides, two boards 1222 of bending are connected with the edge fixed of the corresponding hole 121 of the web of vertical keel 12, be equipped with the hole on the web of vertical keel and with the C type snap-in board that the hole corresponds in order to provide the joint interface of spool mounting, the position in a plurality of holes can be preset according to the construction demand on the web of vertical keel, in order to adjust the position of articulating of spool mounting 3.
The line box fossil fragments 2 are the I shape fossil fragments, and line box fossil fragments include two curb plates 21 and a plurality of line box grooves 22, and the both ends of curb plate 21 are equipped with perpendicular board 23 of bending, in this embodiment, through fastener 4 with the perpendicular board 23 of bending of line box fossil fragments 2 and two perpendicular fossil fragments 12 fixed perpendicular connections, fastener 4 can be ordinary self-tapping screw, also can be check bolt, also can be the rivet.
Line box fossil fragments 2 can also be connected through the mode that articulates with the vertical keel, and specific saying sets for the width of two curb plates 21 of line box fossil fragments and the width of hole 121 on the web of two vertical keels 12 to equal, then can be directly with the board 23 of bending of the tip of line box fossil fragments 2 inwards bend, then will bend the portion 23 to articulate on the hole 121 of vertical keel web, simple to operate is swift, and is quick detachable.
Referring to fig. 3, any one of the plurality of wire box slots 22 includes two support plates 221 and a bottom plate 222, so as to form a slot structure for installing the wire box, a plurality of second wire tube holes 2211 are symmetrically arranged on a main body of the support plate 221, a wire box fixing plate 2212 is arranged on one side of the support plate 221, the bottom plate 222 is provided with a plurality of third wire tube holes 2221, so as to provide threading holes for wires connected with the wire box, so that the wires can be fixed in order, the number of the wire box slots 22 in the wire box keel can be set according to construction requirements, only the support plate and the bottom plate with the wire tube holes need to be welded on the side edge of the wire box keel, so as to form the wire box slots, and the first wire tube hole 211, the second wire tube holes 2211 and the third wire tube holes 2221 can be opened according to.
In this embodiment, a wire box fixing plate 2212 is further provided at one side of the supporting plate 221 of the keel of the wire box, the wire box fixing plate 2212 has an elliptical structure so as to fix the box covers of two wire box grooves connected to each other at the same time, and the wire box fixing plate 2212 may also have a circular structure.
The conduit pipe fixing part 3 comprises a first plate 31 and a second plate 32, the first plate 31 is fixedly connected with the second plate 32, the first plate 31 is provided with a conduit pipe hole 311, the middle end of the second plate is provided with a clamping part 321, as shown in fig. 4, the clamping part 321 is an L-shaped plate, in this embodiment, the clamping part 321 is one end which is turned out from the main body of the second plate and connected to the through hole of the main body, and is bent to form an L-shaped plate, the clamping part 321 can also be a finished L-shaped plate welded on the main body of the second plate 32, so that the conduit pipe fixing part 3 can be clamped with the hole 121 on the web plate of the vertical keel 12 through the L-shaped plate, the L-shaped plate of the conduit pipe fixing part 3 can also be clamped with the C-shaped clamping plate 122 on the web plate of the vertical keel 12, the up-down position adjustment can be carried out according to the length of the conduit pipe in construction, so that the wire pipe fixing piece can be finely adjusted in the left and right positions according to requirements.
Fig. 5 shows a schematic structural diagram of another embodiment of the conduit pipe fixing member 3, fig. 6 is a left side view of the conduit pipe fixing member 3, fig. 7 is a schematic diagram of the conduit pipe fixing member 3 after being clamped with the upright keel 12, as shown, the conduit pipe fixing member comprises a first plate 31 and a second plate 32, the first plate 31 is fixedly connected with the second plate 32, the first plate 31 is provided with a conduit pipe hole 311, the middle end of the second plate is provided with a clamping portion 321, in this embodiment, both ends of the clamping portion 321 are in an E-shaped structure, the clamping portion 321 is a protrusion of a V-shaped structure on the main body of the second plate, and comprises a bottom plate 3211 and wing plates 3212 located at both ends of the bottom plate 3211, through the E-shaped structures at both ends of the second plate 32, the conduit pipe fixing member 3 clamps the flange of the upright keel 12 therein through the protrusion 321 of the V-shaped structure (i.e. the clamping portion 321) and the main plate of the second plate 32, in order to enhance the stability between the conduit fixing member 3 and the furring channel 12, the portion of the second plate 32 connected to the V-shaped protrusion is formed in a semicircular curved structure.
The adjustable connection structure for the wire pipe fixing keel is simple in structure, the installation process is more convenient to operate, and the keel structure is convenient to disassemble and assemble.
The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a spool fixed keel connection structure with adjustable, its characterized in that, spool fixed keel connection structure with adjustable includes: a keel connecting structure (1), a wire box keel and a wire tube fixing piece,
fossil fragments connection structure includes: a transverse keel (11) and two vertical keels (12), wherein the transverse keel (11) is a U-shaped keel, a plurality of bulges (111) are arranged at symmetrical positions on two flanges of the transverse keel,
any one of the two vertical keels (12) is a C-shaped keel, a web plate of the vertical keel (12) is provided with a plurality of holes (121),
one ends of the two vertical keels (12) are clamped on the bulges (111) of the transverse keels (11) to form a T-shaped connecting structure;
the wire box keel is an I-shaped keel, the wire box keel comprises two side plates (21) and a plurality of wire box grooves (22), a plurality of first wire tube holes (211) are symmetrically formed in the two side plates (21), vertical bending plates (23) are arranged at two ends of each side plate (21), and the wire box keel is fixedly and vertically connected with the two vertical keels (12) through the vertical bending plates (23);
the line pipe fixing piece comprises a first plate (31) and a second plate (32), the first plate (31) is fixedly connected with the second plate (32), the first plate (31) is provided with a line pipe hole (311), and the middle end of the second plate (32) is provided with a clamping part (321);
the spool fixing piece is connected with the vertical keel (12) in a clamped mode through the clamping portion (321).
2. The adjustable conduit fixing keel connecting structure according to claim 1,
any one of the trunk line box grooves (22) comprises two supporting plates (221) and a bottom plate (222), a plurality of second line pipe holes (2211) are symmetrically formed in the main body of each supporting plate (221), a line box fixing plate (2212) is arranged on one side of each supporting plate (221), and a plurality of third line pipe holes (2221) are formed in the bottom plate (222).
3. The adjustable conduit fixing keel connecting structure according to claim 1, wherein a plurality of C-shaped snap-in plates (122) are arranged at positions corresponding to a plurality of holes (121) on the web plate of the vertical keel, the C-shaped snap-in plates (122) comprise a ridge plate (1221) and two bending plates (1222) which are formed by vertically bending the two sides of the ridge plate in the same direction, and the two bending plates (1222) are fixedly connected with the edges of the corresponding holes (121) on the web plate of the vertical keel (12).
4. The adjustable conduit fixing keel connecting structure according to claim 1,
the clamping part (321) is an L-shaped plate.
5. The adjustable conduit fixing keel connecting structure according to claim 1, wherein the clamping portion (321) is a V-shaped protrusion, and two ends of the clamping portion (321) form an E-shaped structure.
6. The adjustable conduit fixing keel connecting structure according to claim 1, wherein a plurality of through holes (123) are formed at symmetrical positions on both flanges of the two vertical keels (12).
7. An adjustable conduit fixing keel connection according to claim 2, wherein the width of the two side plates (21) of the box keel is equal to the width of the holes (121) in the webs of the two vertical keels (12).
8. The adjustable conduit fixing keel connecting structure according to claim 2, wherein a line box fixing plate (2212) is provided at one side of the supporting plate (221) of the line box keel, and the line box fixing plate (2212) is an oval or circular line box fixing plate.
9. The adjustable conduit fixing keel connecting structure according to claim 1, wherein the plurality of protrusions (111) provided on the two flanges of the cross keel (11) are semi-cylindrical structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258337.7A CN111101670B (en) | 2018-10-26 | 2018-10-26 | Adjustable connection structure for spool fixing keel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258337.7A CN111101670B (en) | 2018-10-26 | 2018-10-26 | Adjustable connection structure for spool fixing keel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111101670A true CN111101670A (en) | 2020-05-05 |
| CN111101670B CN111101670B (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811258337.7A Active CN111101670B (en) | 2018-10-26 | 2018-10-26 | Adjustable connection structure for spool fixing keel |
Country Status (1)
| Country | Link |
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| CN (1) | CN111101670B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931349A (en) * | 2021-10-11 | 2022-01-14 | 北新集团建材股份有限公司 | Collapsible fossil fragments, subassembly and wall structure |
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| CN206174422U (en) * | 2016-10-26 | 2017-05-17 | 中冶建工集团有限公司 | A fixed knot constructs for inciting somebody to action on line box is fixed in light gypsum board partition wall |
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| CN206481008U (en) * | 2017-02-28 | 2017-09-08 | 苏州合展设计营造股份有限公司 | A kind of magazine between unified space light steel keel fixes universal accessories |
| CN206681212U (en) * | 2017-04-28 | 2017-11-28 | 漳州优普激光科技有限公司 | Light steel keel with wiring cassette |
| CN206712395U (en) * | 2017-04-28 | 2017-12-05 | 漳州优普激光科技有限公司 | Light steel keel bracket for placing junction box |
| CN207332036U (en) * | 2017-05-31 | 2018-05-08 | 上海聚通装饰集团有限公司 | A kind of light steel keel partition switch, socket box fixed frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338340A1 (en) * | 1988-04-19 | 1989-10-25 | Rittal-Werk Rudolf Loh GmbH & Co. KG | Cable and conduit support for switch gear cubicles |
| CN2486646Y (en) * | 2001-08-02 | 2002-04-17 | 张福长 | Connection structure of light steel false keel |
| RS51781B (en) * | 2007-07-13 | 2011-12-31 | Protektorwerk Florenz Maisch Gmbh. & Co. Kg. | Profile element with a sealing element and production method thereof |
| DE102008045869B4 (en) * | 2008-09-04 | 2015-10-08 | Rittal Gmbh & Co. Kg | Device for guiding and holding cables or hoses |
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| CN106786235A (en) * | 2016-12-14 | 2017-05-31 | 浙江亚厦装饰股份有限公司 | A kind of spool or wire casing fastener and installation method |
| CN206481008U (en) * | 2017-02-28 | 2017-09-08 | 苏州合展设计营造股份有限公司 | A kind of magazine between unified space light steel keel fixes universal accessories |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931349A (en) * | 2021-10-11 | 2022-01-14 | 北新集团建材股份有限公司 | Collapsible fossil fragments, subassembly and wall structure |
| CN113931349B (en) * | 2021-10-11 | 2023-02-24 | 北新集团建材股份有限公司 | Collapsible fossil fragments, subassembly and wall structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111101670B (en) | 2021-04-13 |
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