CN113585460A - A antidetonation wind-resistant building steel construction for riveting bolt - Google Patents
A antidetonation wind-resistant building steel construction for riveting bolt Download PDFInfo
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- CN113585460A CN113585460A CN202110917574.5A CN202110917574A CN113585460A CN 113585460 A CN113585460 A CN 113585460A CN 202110917574 A CN202110917574 A CN 202110917574A CN 113585460 A CN113585460 A CN 113585460A
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- steel
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- angle seat
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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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
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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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/14—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against other dangerous influences, e.g. tornadoes, floods
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses an earthquake-resistant and wind-resistant building steel structure for riveting and bolting, which comprises transverse bearing steel, longitudinal bearing steel, bearing vertical steel and a connecting angle seat, wherein one side of the connecting angle seat is connected with the transverse bearing steel in a clamping manner, the side of the connecting angle seat is connected with the longitudinal bearing steel in a clamping manner, the top end of the connecting angle seat is fixedly connected with the bearing vertical steel, the side surface of the connecting angle seat is connected with a first reinforcing bolt and a second reinforcing bolt in a penetrating manner, the first reinforcing bolt and the second reinforcing bolt are vertically distributed, and the top end of the bearing vertical steel is fixedly provided with a protective steel plate. This kind of an antidetonation anti-wind building steel construction for riveting bolt, simple structure is reasonable, and the modern design utilizes the ability of can splicing of steel construction in the aspect of to building steel structural design, has enlarged the practical scope of steel construction, has improved the stability and the antidetonation anti-wind ability of steel construction.
Description
Technical Field
The invention relates to the technical field of steel structure buildings, in particular to an earthquake-resistant and wind-resistant building steel structure for riveting and bolting.
Background
Steel structures are structures composed of steel materials and are one of the main building structure types. The structure mainly comprises steel beams, steel columns, steel trusses and other members made of section steel, steel plates and the like, and rust removing and preventing processes such as silanization, pure manganese phosphating, washing drying, galvanization and the like are adopted. The components or parts are typically joined by welds, bolts or rivets. Because of its light dead weight, and construction is simple and convenient, widely apply to fields such as large-scale factory building, venue, superelevation layer. The steel structure is easy to rust, and generally the steel structure needs to be derusted, galvanized or painted, and needs to be maintained regularly.
However, for building use, the traditional building construction obtains more materials, the production cycle is long and more production is consumed. We have therefore improved this and propose a structural steel structure for a seismic and wind resistant construction for clinch bolting.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention discloses an earthquake-resistant and wind-resistant building steel structure for riveting and bolting, which comprises transverse bearing steel, longitudinal bearing steel, bearing vertical steel and a connecting angle seat, wherein one side of the connecting angle seat is connected with the transverse bearing steel in a clamping manner, the side of the connecting angle seat is connected with the longitudinal bearing steel in a clamping manner, the top end of the connecting angle seat is fixedly connected with the bearing vertical steel, the side surface of the connecting angle seat is connected with a first reinforcing bolt and a second reinforcing bolt in a penetrating manner, the first reinforcing bolt and the second reinforcing bolt are vertically distributed, and the top end of the bearing vertical steel is fixedly provided with a protective steel plate.
According to a preferable technical scheme, first reinforcing steel is fixedly arranged on two side faces of the transverse bearing steel, a first clamping groove is formed in the side face of the connecting angle seat, and the transverse bearing steel and the first reinforcing steel are connected with the first clamping groove in a clamping mode.
As a preferable technical solution of the present invention, the number of the first reinforcing steels is six, and the corresponding positions of the side surfaces of the first reinforcing steels are respectively provided with first aligning through holes, the first aligning through holes are connected with first reinforcing bolts in a penetrating manner, the first reinforcing bolts are distributed in a transverse direction, and the side surface of the connecting angle seat is provided with first screw holes in threaded connection with the first reinforcing bolts.
According to a preferable technical scheme, second reinforcing steel is fixedly arranged at the top end and the bottom end of the longitudinal bearing steel, and a second clamping groove which is clamped and connected with the longitudinal bearing steel and the second reinforcing steel together is formed in the side face of the connecting angle seat.
As a preferable technical scheme of the present invention, the number of the second reinforcing steel is six, a second aligning through hole penetrating and connecting with a second reinforcing bolt is formed in a corresponding position on a side surface of the second reinforcing steel, the second reinforcing bolts are vertically distributed, and a second screw hole in threaded connection with the second reinforcing bolt is formed at the bottom end of the connecting angle seat.
As a preferred technical scheme of the invention, the connecting angle seat comprises a point angle seat, a corner seat and a four-connecting angle seat, the point angle seat is connected with a transverse bearing steel and a longitudinal bearing steel, and the inner side of the point angle seat is provided with a tension steel wire rope.
As a preferred technical scheme of the invention, the corner seat is connected with two transverse bearing steels and one longitudinal bearing steel or connected with one transverse bearing steel and two longitudinal bearing steels, and the four-corner seat is connected with two transverse bearing steels and two longitudinal bearing steels.
As a preferred technical scheme of the invention, the bottom end and the top end of the bearing vertical steel are welded and fixed with the connecting angle seat, and the bearing vertical steel is arranged at the central position of the connecting angle seat.
The invention has the beneficial effects that:
1. according to the earthquake-resistant wind-resistant building steel structure for riveting and bolting, the transverse bearing steel, the longitudinal bearing steel, the connecting angle seat and the bearing vertical steel are correspondingly connected through the transverse bearing steel, the longitudinal bearing steel, the connecting angle seat and the bearing vertical steel, so that a steel structure frame can be formed, and the splicing of a steel structure building is realized;
2. according to the earthquake-resistant wind-resistant building steel structure for riveting and bolting, the steel structure frame range is expanded and the practical performance of a steel structure building is improved by arranging the point angle seat, the corner seat and the four-connection angle seat;
3. this kind of an antidetonation anti-wind building steel construction for riveting bolt through the pulling force wire rope that is equipped with, pulling force wire rope has the constraint effect to near connecting the angle seat to bearing steel, vertical bearing steel and the bearing founds the steel, has improved the antidetonation anti-wind ability of steel construction.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of an earthquake-resistant and wind-resistant building steel structure for rivet bolting according to the present invention;
FIG. 2 is a first schematic diagram of the explosion at the corner joint of the steel structure of the present invention;
FIG. 3 is a second schematic diagram of the explosion at the corner joint of the steel structure of the present invention;
FIG. 4 is an enlarged schematic view of part A of the present invention;
fig. 5 is an enlarged schematic view of part B of the present invention.
In the figure:
1. transverse bearing steel; 101. a first reinforcing steel; 102. a first alignment perforation;
2. longitudinal bearing steel; 201. a second reinforcing steel; 202. a second alignment perforation;
3. bearing vertical steel;
4. connecting the corner seats; 401. a first card slot; 402. a first screw hole; 403. a second card slot; 404. a second screw hole; 405. a point angle seat; 406. a corner seat; 407. a four-corner seat;
5. a first reinforcing plug;
6. a second reinforcing plug;
7. and (5) a protective steel plate.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1-5, the earthquake-resistant and wind-resistant building steel structure for riveting and bolting of the present invention comprises a transverse bearing steel 1, a longitudinal bearing steel 2, a bearing vertical steel 3 and a connecting angle seat 4, wherein one side of the connecting angle seat 4 is connected with the transverse bearing steel 1 in a clamping manner, the side of the connecting angle seat 4 is connected with the longitudinal bearing steel 2 in a clamping manner, the top end of the connecting angle seat 4 is fixedly connected with the bearing vertical steel 3, the side of the connecting angle seat 4 is connected with a first reinforcing bolt 5 and a second reinforcing bolt 6 in a penetrating manner, the first reinforcing bolt 5 and the second reinforcing bolt 6 are vertically distributed, and the top end of the bearing vertical steel 3 is fixedly provided with a protective steel plate 7.
The both sides face of horizontal bearing steel 1 all is fixed and is equipped with first reinforcement steel 101, and first draw-in groove 401 has been seted up to the side of connecting angle seat 4, and horizontal bearing steel 1 and first reinforcement steel 101 all are connected with first draw-in groove 401 block, through first reinforcement steel 101 and the first draw-in groove 401 that is equipped with, with horizontal bearing steel 1 and first reinforcement steel 101 block inside first draw-in groove 401, realize connecting the counterpoint between angle seat 4 and the horizontal bearing steel 1 and be connected.
The quantity of first reinforcement steel 101 is six, and the side of first reinforcement steel 101 corresponds the position and has all seted up first counterpoint and perforate 102, first counterpoint is perforated 102 and first reinforcement bolt 5 through connection, first reinforcement bolt 5 is transverse distribution, the side of connecting angle seat 4 is seted up and is tied 5 threaded connection's first screw 402 with first reinforcement, perforate 102 through the first counterpoint that is equipped with, utilize first reinforcement bolt 5 to pass first counterpoint and perforate 102, and cooperate first screw 402 to carry out threaded connection, realize the fixed connection between connecting angle seat 4 and the horizontal load steel 1, avoid producing the condition emergence that breaks away from between horizontal load steel 1 and the connecting angle seat 4 in the whole steel construction use.
The top and the bottom of vertical bearing steel 2 all fix and are equipped with the second and consolidate steel 201, connect the limit side of angle seat 4 and offer the second draw-in groove 403 of being connected with vertical bearing steel 2 and the common block of second reinforcement steel 201, through the second draw-in groove 403 that is equipped with, vertical bearing steel 2 and second reinforcement steel 201 carry out the block with second draw-in groove 403 and fix, realize connecting the counterpoint between angle seat 4 and the vertical bearing steel 2 and be connected, cooperate horizontal bearing steel 1 to use, form the frame construction of steel construction.
The quantity of second reinforcement steel 201 is six, and the side of second reinforcement steel 201 corresponds the position and offers the second counterpoint perforation 202 with second reinforcement bolt 6 through connection, second reinforcement bolt 6 is vertical distribution from top to bottom, connect the bottom of horn seat 4 and offer the second screw 404 with second reinforcement bolt 6 threaded connection, through the second reinforcement bolt 6 that is equipped with, second reinforcement bolt 6 and second screw 404 threaded connection pass three second counterpoint perforation 202 with this, realize the fixed connection between connecting horn seat 4 and vertical bearing steel 2, the connection of horizontal bearing steel 1 of cooperation, steel construction frame's stability has been realized.
The connecting angle seat 4 comprises a point angle seat 405, a corner seat 406 and a four-connecting angle seat 407, the point angle seat 405 is connected with a transverse bearing steel 1 and a longitudinal bearing steel 2, a tension steel wire rope is arranged on the inner side of the point angle seat 405, and when the steel placing structure is in a position with larger wind power, the deformation degree of the steel structure due to the wind power is reduced by using the tension action of the tension steel wire rope, and the stability of the steel mechanism is improved.
The corner seat 406 is connected with two horizontal bearing steels 1 and a vertical bearing steel 2 or is connected with a horizontal bearing steel 1 and two vertical bearing steels 2, the four-connecting-angle seat 407 is connected with two horizontal bearing steels 1 and two vertical bearing steels 2, and the corner seat 406 and the four-connecting-angle seat 407 are convenient for connecting the sideline and the inner part of the steel structure, thereby forming a multi-frame combined structure and improving the practicability of the steel structure.
The bottom end and the top end of the bearing vertical steel 3 are welded and fixed with the connecting angle seat 4, the bearing vertical steel 3 is arranged at the central position of the connecting angle seat 4, the bearing vertical steel 3 is connected with the connecting angle seat 4 through the arranged bearing vertical steel 3, production materials of the bearing vertical steel 3 are saved, and meanwhile, the position of the bearing vertical steel 3 is subjected to standardized adjustment.
The working principle is as follows: the earthquake-resistant wind-resistant building steel structure for riveting and bolting is different from the prior art, has reasonable structure, convenient use and simple operation, and can enable a user to simply and clearly understand the working principle; when in use, firstly, the transverse bearing steel 1, the longitudinal bearing steel 2, the bearing vertical steel 3 and the connecting angle seat 4 are spliced, and the concrete method comprises the following steps: the transverse bearing steel 1 and the first reinforcing steel 101 are clamped inside the first clamping groove 401, then the first reinforcing bolt 5 is utilized to penetrate through the first contraposition through hole 102, the first screw hole 402 is matched for threaded connection, fixed connection between the connecting angle seat 4 and the transverse bearing steel 1 is achieved, then the longitudinal bearing steel 2 and the second reinforcing steel 201 are clamped and fixed with the second clamping groove 403, then the second reinforcing bolt 6 is in threaded connection with the second screw hole 404 and penetrates through the three second contraposition through holes 202, fixed connection between the connecting angle seat 4 and the longitudinal bearing steel 2 is achieved, then the bottom end and the top end of the bearing vertical steel 3 are fixedly welded with the connecting angle seat 4, a protective steel plate 7 is fixedly arranged at the top end of the whole steel structure, and therefore connection of the whole steel structure building can be achieved.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
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 (8)
1. The utility model provides an antidetonation wind-resistant building steel structure for riveting bolt, includes horizontal bearing steel (1), vertical bearing steel (2), bearing and founds steel (3) and connect angle seat (4), its characterized in that, one side and horizontal bearing steel (1) block of connecting angle seat (4) are connected, the avris of connecting angle seat (4) is connected with vertical bearing steel (2) block, the top and the bearing of connecting angle seat (4) found steel (3) fixed connection, the side through connection of connecting angle seat (4) has first reinforcement bolt (5) and second reinforcement bolt (6), just first reinforcement bolt (5) and second reinforcement bolt (6) are mutually perpendicular and distribute, the top fixed protection steel sheet (7) that is equipped with of bearing founds steel (3).
2. An earthquake-resistant and wind-resistant building steel structure for riveting and bolting as claimed in claim 1, wherein both side surfaces of said transverse bearing steel (1) are fixedly provided with first reinforcing steel (101), the side surface of said connecting angle seat (4) is provided with a first clamping groove (401), and said transverse bearing steel (1) and said first reinforcing steel (101) are connected with said first clamping groove (401) in a clamping manner.
3. An earthquake-resistant and wind-resistant building steel structure for riveting and bolting according to claim 2, characterized in that the number of the first reinforcement steels (101) is six, and corresponding positions of the side surfaces of the first reinforcement steels (101) are provided with first aligning through holes (102), the first aligning through holes (102) are connected with the first reinforcement bolts (5) in a penetrating manner, the first reinforcement bolts (5) are transversely distributed, and the side surfaces of the connection angle seats (4) are provided with first screw holes (402) which are in threaded connection with the first reinforcement bolts (5).
4. An earthquake-resistant and wind-resistant building steel structure for riveting and bolting as claimed in claim 1, wherein second reinforcing steel (201) is fixedly arranged at both the top end and the bottom end of the longitudinal bearing steel (2), and a second clamping groove (403) which is clamped and connected with the longitudinal bearing steel (2) and the second reinforcing steel (201) together is formed on the side surface of the connecting angle seat (4).
5. The earthquake-resistant and wind-resistant building steel structure for riveting and bolting of claim 4, wherein the number of the second reinforcing steel (201) is six, a second aligning perforation (202) which is in through connection with a second reinforcing bolt (6) is formed in a corresponding position on the side surface of the second reinforcing steel (201), the second reinforcing bolts (6) are vertically distributed, and a second screw hole (404) which is in threaded connection with the second reinforcing bolt (6) is formed in the bottom end of the connecting angle seat (4).
6. An earthquake-resistant and wind-resistant building steel structure for riveting and bolting according to claim 1, characterized in that said connection corner seats (4) comprise point corner seats (405), corner seats (406) and four corner seats (407), the point corner seats (405) are connected with a transverse bearing steel (1) and a longitudinal bearing steel (2) and the inner side of said point corner seats (405) is provided with a tension steel wire rope.
7. An earthquake-resistant and wind-resistant building steel structure for riveting and bolting according to claim 6, characterized in that said corner seats (406) are connected with two transverse bearing steels (1) and one longitudinal bearing steel (2) or one transverse bearing steel (1) and two longitudinal bearing steels (2), and said four corner seats (407) are connected with two transverse bearing steels (1) and two longitudinal bearing steels (2).
8. An earthquake-resistant and wind-resistant building steel structure for riveting and bolting as claimed in claim 1, wherein the bottom end and the top end of said bearing vertical steel (3) are welded and fixed with the connecting angle seat (4), and said bearing vertical steel (3) is arranged at the center of the connecting angle seat (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110917574.5A CN113585460A (en) | 2021-08-11 | 2021-08-11 | A antidetonation wind-resistant building steel construction for riveting bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110917574.5A CN113585460A (en) | 2021-08-11 | 2021-08-11 | A antidetonation wind-resistant building steel construction for riveting bolt |
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| Publication Number | Publication Date |
|---|---|
| CN113585460A true CN113585460A (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110917574.5A Pending CN113585460A (en) | 2021-08-11 | 2021-08-11 | A antidetonation wind-resistant building steel construction for riveting bolt |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203284888U (en) * | 2013-04-23 | 2013-11-13 | 河南杭萧钢构有限公司 | Steel structure connection node |
| CN204983170U (en) * | 2015-08-28 | 2016-01-20 | 洛阳美辰钢构工程有限公司 | Connected node of steel I -beam and rectangle steel column |
| CN108222262A (en) * | 2018-03-23 | 2018-06-29 | 柏林 | A kind of assembling structure of assembling type steel structure building |
| CN109930746A (en) * | 2019-04-01 | 2019-06-25 | 南京林业大学 | A kind of assembled bamboo wooden frame column and its connector, assembly and disassembly methods and bamboo-wood structure node |
| CN210263390U (en) * | 2019-05-28 | 2020-04-07 | 致兴国际钢结构(北京)有限公司 | Connecting structure of steel structure beam and upright post |
| CN112267565A (en) * | 2020-11-23 | 2021-01-26 | 辽宁工程技术大学 | Assembled steel beam column connected node |
| CN112282059A (en) * | 2020-11-25 | 2021-01-29 | 灵境(湖北)科技有限公司 | Connecting steel member for construction site |
-
2021
- 2021-08-11 CN CN202110917574.5A patent/CN113585460A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203284888U (en) * | 2013-04-23 | 2013-11-13 | 河南杭萧钢构有限公司 | Steel structure connection node |
| CN204983170U (en) * | 2015-08-28 | 2016-01-20 | 洛阳美辰钢构工程有限公司 | Connected node of steel I -beam and rectangle steel column |
| CN108222262A (en) * | 2018-03-23 | 2018-06-29 | 柏林 | A kind of assembling structure of assembling type steel structure building |
| CN109930746A (en) * | 2019-04-01 | 2019-06-25 | 南京林业大学 | A kind of assembled bamboo wooden frame column and its connector, assembly and disassembly methods and bamboo-wood structure node |
| CN210263390U (en) * | 2019-05-28 | 2020-04-07 | 致兴国际钢结构(北京)有限公司 | Connecting structure of steel structure beam and upright post |
| CN112267565A (en) * | 2020-11-23 | 2021-01-26 | 辽宁工程技术大学 | Assembled steel beam column connected node |
| CN112282059A (en) * | 2020-11-25 | 2021-01-29 | 灵境(湖北)科技有限公司 | Connecting steel member for construction site |
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Application publication date: 20211102 |