CN111236493A - Partition wall dysmorphism connection structure - Google Patents
Partition wall dysmorphism connection structure Download PDFInfo
- Publication number
- CN111236493A CN111236493A CN202010014618.9A CN202010014618A CN111236493A CN 111236493 A CN111236493 A CN 111236493A CN 202010014618 A CN202010014618 A CN 202010014618A CN 111236493 A CN111236493 A CN 111236493A
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- Prior art keywords
- vertical keel
- partition wall
- keel
- vertical
- connecting piece
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- 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.)
- Pending
Links
- 238000005192 partition Methods 0.000 title claims abstract description 34
- 206010066054 Dysmorphism Diseases 0.000 title claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 230000008093 supporting effect Effects 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 7
- 239000012634 fragment Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
- E04B2/78—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
- E04B2/78—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips
- E04B2/7854—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips of open profile
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/82—Removable non-load-bearing partitions; Partitions with a free upper edge characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions as far as related to the connection with other parts of the building
Abstract
The invention discloses a partition wall special-shaped connecting structure, which comprises: the wall body comprises two transverse keels, a first vertical keel, a second vertical keel, a decorative plate and a steel wire mesh, wherein the end parts of the two transverse keels are welded and connected to form an included angle of 120 degrees, the first vertical keel and the second vertical keel are respectively vertically arranged on the two transverse keels, and the lower ends of the first vertical keel and the second vertical keel are connected with the transverse keels through fixing pieces; be provided with connecting piece one between vertical keel one and the vertical keel two, connecting piece one includes backup pad and bight strengthening band, and the bight strengthening band is buckled into the V font by the strip steel sheet, and the backup pad is equipped with two and symmetric distribution altogether. The connecting piece is additionally arranged between the two vertical keels arranged at the included angle of the special-shaped partition wall, the connecting piece is simple in structure, the anti-seismic and anti-stretching effects of the two vertical keels can be improved, the structural strength is improved, the partition wall is prevented from shaking greatly, and the service life of the partition wall is prolonged.
Description
Technical Field
The invention relates to the technical field of building structures, in particular to a partition wall special-shaped connecting structure.
Background
The skeleton partition wall is also called as keel partition wall, and mainly uses timber or steel to form the skeleton, and then two sides are made into surface layers. The light partition skeleton formed by installing panels on two sides of a partition keel consists of an upper sill, a lower sill, vertical ribs, transverse ribs (also called crosspieces), inclined struts and the like. The distance between the vertical ribs depends on the specification of the used material, the horizontal ribs are set according to the specification of the plate material along the height direction between the vertical ribs by using the material with the same section, and the two ends are tightly supported and nailed so as to increase the stability. The surface layer material is usually used for light sheets such as fiber boards, gypsum plasterboard, plywood, calcium plastic boards, plastic aluminum boards, fiber cement boards and the like. The fixing method of the panel and the framework can adopt nails, expansion bolts, rivets, self-tapping screws or metal clips and the like according to different materials.
At present, current dysmorphism partition wall has following problem: the special-shaped partition wall generally has certain angle, and the contained angle department sets up two vertical joist cooperation horizontal keel and fixes, and its antidetonation and tensile strength ability are relatively weak, and structural strength is poor, produces rocking by a relatively large margin easily, and life is lower. For this reason, a new scheme needs to be designed to give improvements.
Disclosure of Invention
The invention aims to provide a partition wall special-shaped connecting structure, which solves the problems in the background technology and meets the actual use requirements.
In order to achieve the purpose, the invention provides the following technical scheme: a partition wall dysmorphism connection structure includes: the wall comprises two transverse keels, a first vertical keel, a second vertical keel, a decorative plate and a steel wire mesh, wherein the end parts of the two transverse keels are welded to form an included angle of 120 degrees, the first vertical keel and the second vertical keel are respectively vertically arranged on the two transverse keels, and the lower ends of the first vertical keel and the second vertical keel are connected with the transverse keels through fixing parts; be provided with connecting piece one between vertical keel one and the vertical keel two, connecting piece one includes backup pad and bight strengthening band, the bight strengthening band is buckled into the V font by the strip steel sheet, the backup pad is equipped with two and symmetric distribution altogether, terminal and bight strengthening band top welded connection of backup pad, two welded connection just arranges in between vertical keel one and the vertical keel two between the backup pad, the connecting hole has been seted up on the bight strengthening band, bight strengthening band inner wall left side and vertical keel a lateral wall laminating, bight strengthening band inner wall right side and the laminating of vertical keel two lateral walls and adopt mounting fixed connection.
As a preferred embodiment of the present invention, the opening of the cross keel is upward, the lower ends of the first and second vertical keels are embedded in the cross keel, and the outer walls of the first and second vertical keels are attached to the inner wall of the cross keel.
In a preferred embodiment of the present invention, the corner reinforcing band has a bending angle of 120 °, and the support plate has a right-angled trapezoidal structure.
As a preferred embodiment of the invention, the steel wire mesh is arranged between the cross keel and the decorative plate, and the steel wire mesh is respectively connected with the first vertical keel, the second vertical keel, the cross keel and the decorative plate in a bundling manner.
In a preferred embodiment of the present invention, the decorative plate is fixedly connected to the first vertical keel, the second vertical keel and the cross keel by self-tapping screws, and the spray wall body is filled inside the decorative plate.
As a preferred embodiment of the present invention, the fixing member is one of a blind rivet and a self-tapping screw.
The utility model provides a partition wall dysmorphism connection structure, partition wall dysmorphism connection structure still includes connecting piece two, connecting piece two is arranged in between vertical keel one and the vertical keel two.
As a preferred embodiment of the invention, the second connecting member is formed by bending the middle part of the vertical keel, the back part of the second connecting member forms a V-shaped structure, and supporting parts are formed on two sides of the second connecting member, and the supporting parts are respectively attached to the first vertical keel and the second vertical keel and fixedly connected by fixing parts.
In a preferred embodiment of the present invention, the second connecting member has a bending angle of 120 °.
Compared with the prior art, the invention has the following beneficial effects:
this connection structure has increased the connecting piece between two perpendicular keels that the contained angle department of dysmorphism partition wall set up, and the simple structure of this connecting piece can increase two perpendicular keels's antidetonation, stretch-proofing effect, increases structural strength simultaneously, avoids it to produce great rocking, improves the life of partition wall.
Drawings
FIG. 1 is a sectional view of a partition wall according to a first embodiment of the present invention;
fig. 2 is a connecting structure diagram of a vertical keel and a first connecting piece according to a first embodiment of the invention;
FIG. 3 is a diagram illustrating a first connecting member according to a first embodiment of the present invention;
FIG. 4 is a structural diagram of a partition wall profile according to a second embodiment of the present invention;
fig. 5 is a structural diagram of a second connecting member in the second embodiment of the present invention.
In the figure, a transverse keel 1; a first vertical keel 2; a decorative panel 3; spraying and building a wall body layer 4; a steel wire mesh 5; a first connecting piece 6; a second vertical keel 7; a fixing member 8; a support plate 9; a corner reinforcing band 10; a connecting hole 11; a second connecting piece 12; a support portion 13.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1
Referring to fig. 1-3, the present invention provides a technical solution: a partition wall dysmorphism connection structure includes: the wall comprises two transverse keels 1, two vertical keels 2, two vertical keels 7, a decorative plate 3 and a steel wire mesh 5, the two transverse keels 1 are arranged, the end parts of the two transverse keels 1 are connected in a welding mode to form an included angle of 120 degrees, the first vertical keel 2 and the second vertical keel 7 are respectively vertically arranged on the two transverse keels 1, the lower ends of the first vertical keel 2 and the second vertical keel 7 are connected with the transverse keels 1 through fixing pieces 8, and the first vertical keel 2, the second vertical keel 7 and the transverse keel 1 are supporting components of the wall 1; be provided with connecting piece 6 between vertical keel 2 and the vertical keel 7, connecting piece 6 includes backup pad 9 and bight reinforcing band 10, and bight reinforcing band 10 is buckled into the V font by the bar steel sheet, and connecting piece 6 still can adopt steel sheet stamping forming to buckle and be backup pad 9 and bight reinforcing band 10, processing is simple, the batch production of being convenient for, but the equipment requirement is higher. Backup pad 9 is equipped with two and symmetric distribution altogether, 9 terminal and 10 top welded connections in bight strengthening band of backup pad, welded connection just arranges in between vertical keel one 2 and the vertical keel two 7 between two backup pads 9, play the supporting effect, leave the gap between two backup pads 9, play the buffering effect, connecting hole 11 has been seted up on the bight strengthening band 10, 10 inner wall left sides in bight strengthening band laminate with vertical keel one 2 lateral walls, 10 inner wall right sides in bight strengthening band laminate and adopt 8 fixed connection of mounting with two 7 lateral walls of vertical keel, high durability and convenient installation, the joint strength between vertical keel one 2 and the vertical keel two 7 is improved after the connection.
Further improved, as shown in fig. 1: the opening of horizontal keel 1 is upwards, and the lower extreme of vertical keel one 2 and vertical keel two 7 is inlayed in horizontal keel 1, and the outer wall of vertical keel one 2 and vertical keel two 7 and the laminating of horizontal keel 1 inner wall, and the installation is more firm.
In a further improvement, as shown in fig. 3: the bending angle of the corner reinforcing belt 10 is 120 degrees, the supporting plates 9 are in a right-angle trapezoidal structure and have certain supporting strength, and the two supporting plates 9 are connected to have a buffering effect.
Further improved, as shown in fig. 1: the steel wire mesh 5 is arranged between the transverse keel 1 and the decorative plate 3, the steel wire mesh 5 is respectively connected with the vertical keel one 2, the vertical keel two 7, the transverse keel 1 and the decorative plate 3 in a bundling mode, and the wavy steel wire mesh is adopted, so that the rigid stretching capacity is improved.
Further improved, as shown in fig. 1: decorative board 3 adopts self-tapping screw respectively with vertical keel one 2, vertical keel two 7 and horizontal fossil fragments 1 fixed connection, and 3 inboard packings of decorative board have the wall layer 4 of spouting building, adopt self-tapping screw easy to assemble, set up and spout the wall layer 4 and increase thermal insulation performance.
Specifically, the fixing member 8 employs one of a blind rivet and a self-tapping screw.
This embodiment is connected a vertical keel 2 and a vertical keel 7 through a connecting piece 6, has certain antidetonation and stretch-proofing effect after connecting, improves its life.
Example 2
Referring to fig. 4-5, the present invention provides a technical solution: the utility model provides a partition wall dysmorphism connection structure, partition wall dysmorphism connection structure still includes two 12 connecting pieces, and two 12 connecting pieces are arranged in between vertical keel one 2 and the vertical keel two 7, come to connect vertical keel one 2 and vertical keel two 7 through two 12 connecting pieces.
In a further improvement, as shown in fig. 4-5: two 12 adoption vertical keel of connecting piece are by the middle part shaping of buckling, and the back of two 12 connecting pieces forms V font structure, and both sides are formed with supporting part 13, and supporting part 13 laminates with vertical keel one 2 and vertical keel two 7 respectively and adopts 8 fixed connection of mounting, and two 12 adoption vertical keel preparation of connecting piece buckle vertical keel can, it is more convenient to draw materials and make.
Specifically, the bending angle of the second connecting piece 12 is 120 °.
In this embodiment, come to connect vertical keel one 2 and vertical keel two 7 through connecting piece two 12, have certain antidetonation and stretch-proofing effect after connecting, improve its life, the shaping is buckled to connecting piece two 12 adoption vertical keel, and it is more convenient to draw materials and make.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A partition wall dysmorphism connection structure includes: wall body, its characterized in that: the wall comprises two transverse keels (1), two vertical keels (2), two vertical keels (7), a decorative plate (3) and a steel wire mesh (5), the number of the transverse keels (1) is two, the end parts of the two transverse keels (1) are welded and connected to form an included angle of 120 degrees, the first vertical keel (2) and the second vertical keel (7) are respectively and vertically arranged on the two transverse keels (1), and the lower ends of the first vertical keel (2) and the second vertical keel (7) are connected with the transverse keels (1) through fixing pieces (8);
be provided with connecting piece (6) between vertical keel (2) and vertical keel two (7), connecting piece (6) are including backup pad (9) and bight reinforcing band (10), bight reinforcing band (10) are buckled into the V font by the strip steel sheet, backup pad (9) are equipped with two and symmetric distribution altogether, backup pad (9) end and bight reinforcing band (10) top welded connection, two welded connection just arranges in between vertical keel (2) and vertical keel two (7) between backup pad (9), connecting hole (11) have been seted up on bight reinforcing band (10), bight reinforcing band (10) inner wall left side and vertical keel (2) lateral wall laminating, bight reinforcing band (10) inner wall right side and vertical keel two (7) lateral wall laminating and adopt mounting (8) fixed connection.
2. A partition wall dysmorphism connection structure of claim 1, characterized in that: the opening of horizontal fossil fragments (1) is upwards, the lower extreme of vertical keel (2) and vertical keel two (7) is inlayed in horizontal fossil fragments (1), and the outer wall of vertical keel (2) and vertical keel two (7) and the laminating of horizontal fossil fragments (1) inner wall.
3. A partition wall dysmorphism connection structure of claim 1, characterized in that: the bending angle of the corner reinforcing belt (10) is 120 degrees, and the supporting plate (9) is of a right-angled trapezoid structure.
4. A partition wall dysmorphism connection structure of claim 1, characterized in that: wire net (5) set up between horizontal fossil fragments (1) and decorative board (3), and wire net (5) adopt the mode of tying up to be connected with vertical keel (2), vertical keel two (7), horizontal keel (1) and decorative board (3) respectively.
5. A partition wall dysmorphism connection structure of claim 1, characterized in that: the decorative board (3) adopts self-tapping screws to be fixedly connected with the vertical keel I (2), the vertical keel II (7) and the horizontal keel (1) respectively, and the inner side of the decorative board (3) is filled with the sprayed wall body layer (4).
6. A partition wall dysmorphism connection structure of claim 1, characterized in that: the fixing piece (8) adopts one of a self-plugging rivet and a self-tapping screw.
7. The utility model provides a partition wall dysmorphism connection structure which characterized in that: the partition wall special-shaped connecting structure further comprises a second connecting piece (12), and the second connecting piece (12) is arranged between the first vertical keel (2) and the second vertical keel (7).
8. A partition wall dysmorphism connection structure of claim 7, characterized in that: the connecting piece two (12) adopt the vertical keel and bend the shaping by the middle part, the back of connecting piece two (12) forms V font structure, and both sides are formed with supporting part (13), supporting part (13) respectively with vertical keel one (2) and vertical keel two (7) laminating and adopt mounting (8) fixed connection.
9. A partition wall dysmorphism connection structure of claim 8, characterized in that: the bending angle of the second connecting piece (12) is 120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014618.9A CN111236493A (en) | 2020-01-07 | 2020-01-07 | Partition wall dysmorphism connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014618.9A CN111236493A (en) | 2020-01-07 | 2020-01-07 | Partition wall dysmorphism connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111236493A true CN111236493A (en) | 2020-06-05 |
Family
ID=70876010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010014618.9A Pending CN111236493A (en) | 2020-01-07 | 2020-01-07 | Partition wall dysmorphism connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111236493A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3765138A (en) * | 1971-07-08 | 1973-10-16 | R Bentle | Corner control system for plaster walls |
| CN206495371U (en) * | 2017-01-11 | 2017-09-15 | 山东飞越钢结构工程有限公司 | A kind of 2 light steel wall attachment structures of non-perpendicular handing-over |
| CN207419767U (en) * | 2017-11-22 | 2018-05-29 | 黑龙江双兴医用净化工程有限公司 | Operating room corner structure |
| CN208594669U (en) * | 2018-04-28 | 2019-03-12 | 李杨德 | A kind of assembled plaster tablet suspended ceiling module false keel inner corner trim, external corner connecting piece |
| CN109972771A (en) * | 2019-05-10 | 2019-07-05 | 上海恪耐新材料科技有限公司 | A kind of hollow wall construction |
| CN209854969U (en) * | 2019-03-26 | 2019-12-27 | 上海同集信息科技有限公司 | L-shaped connecting structure of light steel keel composite wall |
-
2020
- 2020-01-07 CN CN202010014618.9A patent/CN111236493A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3765138A (en) * | 1971-07-08 | 1973-10-16 | R Bentle | Corner control system for plaster walls |
| CN206495371U (en) * | 2017-01-11 | 2017-09-15 | 山东飞越钢结构工程有限公司 | A kind of 2 light steel wall attachment structures of non-perpendicular handing-over |
| CN207419767U (en) * | 2017-11-22 | 2018-05-29 | 黑龙江双兴医用净化工程有限公司 | Operating room corner structure |
| CN208594669U (en) * | 2018-04-28 | 2019-03-12 | 李杨德 | A kind of assembled plaster tablet suspended ceiling module false keel inner corner trim, external corner connecting piece |
| CN209854969U (en) * | 2019-03-26 | 2019-12-27 | 上海同集信息科技有限公司 | L-shaped connecting structure of light steel keel composite wall |
| CN109972771A (en) * | 2019-05-10 | 2019-07-05 | 上海恪耐新材料科技有限公司 | A kind of hollow wall construction |
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Application publication date: 20200605 |