CN217326153U - Hollow structure's substitute concrete working of plastics - Google Patents
Hollow structure's substitute concrete working of plastics Download PDFInfo
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- CN217326153U CN217326153U CN202221096199.9U CN202221096199U CN217326153U CN 217326153 U CN217326153 U CN 217326153U CN 202221096199 U CN202221096199 U CN 202221096199U CN 217326153 U CN217326153 U CN 217326153U
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- Y—GENERAL 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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/254—Roof garden systems; Roof coverings with high solar reflectance
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Abstract
The utility model provides a concrete-substituted plastic piece with a hollow structure, which comprises a plurality of groups of concrete-substituted plastic monomers and connecting pieces; the concrete-replacing plastic monomer comprises two groups of plastic shells, each plastic shell is of an open semi-closed structure, the circumference of the open of each plastic shell protrudes outwards to form a supporting turning edge, and a plurality of shoveling buckles are arranged along the outer edge of the circumference of the supporting turning edge; the shovel buckle comprises a buckle block protruding upwards to support the turning edge and a clamping part protruding downwards to support the turning edge, and a connecting groove is formed in the clamping part; the supporting turned edges of the two groups of plastic shells are relatively attached and fixedly connected through a shovel buckle; the connecting piece is a groove-shaped fastener, and two ends of the groove-shaped fastener are respectively buckled in the connecting grooves of the two adjacent groups of concrete-replacing plastic structures. The utility model has high structural strength, easy processing, simple installation and good stability; the house has the advantages of heat absorption, energy storage, heat preservation and sound insulation, can reduce the fluctuation of the temperature difference inside and outside the house, and keeps the inside of the house warm in winter and cool in summer; the usage amount of the concrete can be reduced, thereby realizing energy conservation and emission reduction.
Description
Technical Field
The utility model relates to a building construction material technical field, concretely relates to hollow structure's replacement concrete working of plastics.
Background
The climate of the southern region is a damp-heat type climate, the temperature is high, the humidity is high and the weather is sultry in summer, the surface temperature of the roof is increased under the action of strong sunlight radiation and outdoor temperature, and heat is transferred into the room to increase the indoor temperature, so that life and work are influenced. Therefore, in the peripheral structure of the building, the roof with higher requirement on heat insulation is adopted, and the roof heat insulation can improve the indoor environment of the top layer and reduce the indoor temperature fluctuation. The north of China is dry and extremely cold in winter, the heating supply time in a room is long, the heat insulation performance of a house is improved, and the energy consumption can be reduced. Therefore, the design specifications of houses in China clearly require that the roofs and the outer walls are designed with heat-insulating layers so as to improve the heat-insulating effect of the houses.
At present, the heat insulation measures generally used in China mainly comprise: material heat insulation, ventilation heat insulation, water storage heat insulation, vegetation heat insulation and reflection heat insulation; all need increase roof or wall structure above thermal-insulated mode, not only use or install inconveniently, and lead to later maintenance cost to increase, economic suitability is poor.
In view of this, the present invention provides a hollow structure for replacing concrete plastic members to solve the technical problem existing in the background art.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a hollow structure for replacing concrete plastic parts, which comprises a plurality of groups of concrete plastic single bodies and connecting pieces;
the concrete-replacing plastic monomer comprises two groups of plastic shells, each plastic shell is of an open semi-closed structure, the circumference of the opening of each plastic shell protrudes outwards to form a supporting turning edge, a plurality of shoveling buckles are arranged along the outer edge of the circumference of the supporting turning edge, and the shoveling buckles are perpendicular to the supporting turning edge;
the shovel buckle comprises a buckle block protruding upwards from the upper end of the support turning edge and a clamping part protruding downwards from the lower end of the support turning edge and connected with the plastic shell, and a connecting groove is formed in the clamping part;
the supporting turned edges of the two groups of plastic shells are relatively attached and fixedly buckled and connected through a shovel buckle;
the connecting piece is a groove-shaped fastener, and two ends of the groove-shaped fastener are respectively buckled in the connecting grooves of the two adjacent groups of concrete-replacing plastic structures.
Preferably, the two groups of plastic shells are respectively a plastic shell A;
the plastic shell A is a semi-oblate shell, and the two groups of plastic shells A are buckled to form a oblate structure.
Preferably, the two groups of plastic shells are respectively a plastic shell A and a plastic shell B;
the plastic shell A is a semi-oblate spheroid shell; the plastic shell B is of a frustum-shaped structure and comprises a frustum coaming and a frustum bottom plate arranged at the bottom of the frustum coaming; the plastic shell A and the plastic shell B are buckled to form a concrete-replacing plastic structure.
Preferably, the two groups of plastic shells are respectively a plastic shell B;
the plastic shell B is of a frustum-shaped structure and comprises a frustum coaming and a frustum bottom plate arranged at the bottom of the frustum coaming; the two groups of plastic shells B are buckled to form a plastic structure for replacing concrete.
Preferably, the top of the spherical surface of the plastic housing a is recessed inwards to form a concave part, and concave groove parts from the concave part to the support turning edge are circumferentially arranged on the spherical surface of the plastic housing a at equal intervals.
Preferably, the frustum bottom plate surface of the plastic shell B protrudes outwards to form a middle supporting foot strip.
Preferably, the inner side of the top of the spherical surface of the plastic shell A is provided with an annular rib plate, and the inner spherical surface of the plastic shell A is circumferentially provided with reinforcing rib plates at equal intervals, wherein the reinforcing rib plates extend from the annular rib plate to the supporting turning edge.
Preferably, an annular rib plate is arranged at the center of the inner side of the frustum bottom plate of the plastic shell B, and reinforcing rib plates from the annular rib plate to the edge of the annular rib plate are arranged at equal intervals in the circumferential direction of the inner side of the frustum bottom plate;
a plurality of triangular rib plates are arranged on the inner side of the peripheral plate of the frustum at equal intervals in the circumferential direction and extend from the edge of the bottom plate of the frustum to the upper edge of the peripheral plate of the frustum.
Preferably, the plastic shell A or the plastic shell B is provided with air holes.
Preferably, a plurality of reinforcing ribs are arranged on the outer side of the groove-shaped fastener plate body along the width direction of the groove-shaped fastener.
The above technical scheme of the utility model at least include following technological effect:
1. the plastic part can replace concrete to be used (instead of concrete) as a building construction material, and is particularly suitable for the topmost heat insulation plate of a building; the structure has high strength, easy processing, simple installation and good stability; the heat-absorbing and energy-storing house has the advantages of heat absorption, energy storage and heat preservation, can reduce the fluctuation of the temperature difference between the inside and the outside of the house and keeps the inside of the house warm in winter and cool in summer; the sound insulation effect of the house can be improved, and if the building is applied to pouring of floors of upper and lower buildings, the influence of upper-layer residents on lower-layer residents can be effectively isolated; the concrete-replacing plastic structure can occupy a large amount of space during pouring, and can reduce the use amount of concrete, thereby realizing energy conservation and emission reduction;
2. the concrete-replacing plastic monomer of the embodiment of the application adopts the combination of plastic shell structures with different structures, and the thickness of the concrete-replacing plastic monomer can be selected according to requirements, so that the concrete-replacing plastic monomer can meet various use scenes;
3. the plastic shell structure can be well combined with concrete, so that the position deviation of the concrete substitute plastic monomer caused by concrete impact during pouring can be avoided; in addition, the contact area between the concrete-replacing plastic monomer and concrete is increased, so that the heat exchange effect of the concrete-replacing plastic monomer is improved;
4. the plastic casing of this application embodiment can effectual improvement plastic casing's structural strength through its inside annular floor and the reinforced rib board that sets up, improves and replaces the whole compressive strength of concrete plastics monomer to concrete can not take place to cave in and warp and lead to its functional loss pouring the in-process.
The embodiment of the utility model provides a still include other advantages and see in detail in concrete embodiment.
Drawings
FIG. 1 is a top view of a structure in a connection state of several generations of concrete plastic structures according to an embodiment of the present application;
fig. 2 is a schematic perspective view of a concrete-substituting plastic structure formed by a plastic shell a and a plastic shell a according to an embodiment of the present application;
fig. 3 is a first view structural diagram of a concrete-substituting plastic structure composed of a plastic shell a and a plastic shell B according to an embodiment of the present application;
fig. 4 is a second perspective structural view of a concrete-substitute plastic structure composed of a plastic shell a and a plastic shell B according to an embodiment of the present disclosure;
fig. 5 is a first perspective structural view of the plastic housing a in fig. 2 or fig. 3;
fig. 6 is a second perspective structural view of the plastic housing a in fig. 2 or 3;
fig. 7 is a first perspective structural view of the plastic housing B in fig. 3 or 4;
FIG. 8 is a structural diagram of a second perspective view of the plastic housing B shown in FIG. 3 or FIG. 4;
fig. 9 is a perspective view of the connector in fig. 1.
Reference numerals:
100. a concrete-substituting plastic monomer;
1. a plastic housing A; 101. a oblate spheroid shell; 102. a concave portion; 103. a concave groove part;
2. a plastic housing B; 201. a frustum coaming; 202. a frustum bottom plate; 203. supporting foot strip
3. Shoveling and buckling; 301. buckling blocks; 302. a connecting groove;
4. air holes are formed; 5. an annular rib plate; 6. a reinforcing rib plate; 7. triangular rib plates; 8. supporting the turned edge;
200. a connecting member; 211. a slot-type fastener; 212. the reinforcing ribs.
Detailed Description
To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings 1 to 9 of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
A kind of hollow structure replaces the concrete plastic part, the plastic part includes several groups of concrete plastic monomer 100 and link 200; the concrete-replacing plastic monomer 100 comprises two groups of plastic shells, each plastic shell is of an open semi-closed structure, the circumference of the open of each plastic shell protrudes outwards to form a supporting turned edge 8, a plurality of shovel buckles 3 are arranged along the outer edge of the circumference of the supporting turned edge 8, and the shovel buckles 3 are perpendicular to the supporting turned edge 8; the shovel buckle 3 comprises a buckle block 301 protruding upwards from the upper end of the support turning edge and a clamping part protruding downwards from the lower end of the support turning edge and connected with the plastic shell, and a connecting groove 302 is formed in the clamping part; the supporting turned edges 8 of the two groups of plastic shells are relatively attached and fixedly buckled and connected through the shovel buckles 3; the connecting member 200 is a groove-shaped fastener 211, and two ends of the groove-shaped fastener 211 are respectively fastened in the connecting grooves 302 of two adjacent sets of concrete-substituted plastic structures.
As shown in figures 1-8: the utility model provides a hollow structure for replacing concrete plastic parts, the plastic parts comprise a plurality of groups of concrete plastic single bodies 100 and connecting pieces 200; the concrete-replacing plastic monomer 100 comprises two groups of plastic shells, the plastic shells are of an open semi-closed structure, the circumference of the open of the plastic shells protrudes outwards to form a supporting turned edge 8, a plurality of shovel buckles 3 are arranged along the outer edge of the circumference of the supporting turned edge 8, and the shovel buckles 3 are perpendicular to the supporting turned edge 8; the shovel buckle 3 comprises a buckle block 301 protruding upwards from the upper end of the support turning edge and a clamping part protruding downwards from the lower end of the support turning edge and connected with the plastic shell, and a connecting groove 302 is formed in the clamping part; the supporting turned edges 8 of the two groups of plastic shells are relatively attached and fixedly buckled and connected through the shovel buckles 3; the connecting piece 200 is a groove-shaped fastener 211, and two ends of the groove-shaped fastener 211 are respectively buckled in the connecting grooves 302 of two adjacent groups of concrete-replacing plastic structures;
when the building is installed, firstly, a bottom layer reinforcing mesh is paved in a roof or floor slab supporting template; secondly, placing a plurality of concrete-substitute plastic monomers in a dense array along a bottom reinforcing mesh, wherein two adjacent groups of the concrete-substitute plastic monomers are fixedly connected through connecting pieces, so that the initial positioning and installation of the modern concrete plastic structure are realized, the number of the concrete-substitute plastic monomers is reasonably selected according to the building area, and the distance between the two adjacent groups of the concrete-substitute plastic monomers is adjusted by selecting the connecting pieces with different lengths; finally, paving a top layer reinforcing mesh on the arranged concrete-replacing plastic structure again, and binding and connecting the top layer reinforcing mesh and the bottom layer reinforcing mesh through trapezoidal reinforcing steel bars arranged among the concrete-replacing plastic monomers at intervals;
the concrete-replacing plastic structure of the embodiment has high structural strength, convenient installation and good stability; the heat-absorbing and energy-storing house has the advantages of absorbing heat, storing energy and preserving heat, can reduce the fluctuation of the temperature difference between the inside and the outside of the house and keeps the inside of the house warm in winter and cool in summer; the sound insulation effect of the house can be improved, and if the building is applied to pouring of floors of upper and lower buildings, the influence of upper-layer residents on lower-layer residents can be effectively isolated; the concrete-replacing plastic structure can occupy a large amount of space during pouring, and can reduce the use amount of concrete, thereby realizing energy conservation and emission reduction.
In one embodiment of the present application, as shown in FIGS. 1-2:
the two groups of plastic shells are respectively a plastic shell A1; the plastic shell A1 is a semi-oblate spheroid shell 101, and two groups of plastic shells A1 are buckled to form a oblate spheroid structure. The plastic monomer replacing concrete in the embodiment is thinner, and the flat mechanism is suitable for use scenes with thinner floor slabs.
In another embodiment of the present application, as shown in FIGS. 3-4:
the two groups of plastic shells are respectively a plastic shell A1 and a plastic shell B2; the plastic shell A1 is a semi-oblate spheroid shell 101; the plastic shell B2 is a frustum-shaped structure, and the plastic shell B2 comprises a frustum enclosing plate 201 and a frustum bottom plate 202 arranged at the bottom of the frustum enclosing plate; the plastic shell A1 and the plastic shell B2 are buckled to form a plastic structure for replacing concrete. The plastic shell B in the concrete-replacing plastic monomer is increased in thickness, the frustum-shaped structure is adopted, the stable placement of the concrete-replacing plastic monomer can be facilitated, and the set concrete-replacing plastic monomer can be used in a use scene of properly increasing the thickness of a floor slab.
In another embodiment of the present application, as shown in fig. 7= 8:
the two groups of plastic shells are respectively a plastic shell B2; the plastic shell B2 is a frustum-shaped structure, and the plastic shell B2 comprises a frustum coaming 201 and a frustum bottom plate 202 arranged at the bottom of the frustum coaming; the two groups of plastic shells B2 are buckled to form a plastic structure for replacing concrete. In the embodiment, the concrete-substituting plastic monomer is formed by buckling and connecting two groups of plastic shells B, and the plastic shells B are thicker, so that the concrete-substituting plastic monomer is thicker, and the use scene of large-volume concrete pouring parts can be met.
In one embodiment of the present application, as shown in fig. 5 and 6:
the top of the spherical surface of the plastic shell A1 is inwards sunken to form a concave part 102, and concave groove parts 103 from the concave part 102 to the supporting turning edge 8 are circumferentially arranged on the spherical surface of the plastic shell A1 at equal intervals; the concave part and the concave groove part form an integrated structure, and the plastic shell A of the structure is well combined with concrete, so that the position deviation of a concrete-substitute plastic monomer caused by concrete impact during pouring can be avoided; in addition, the contact area between the concrete-replacing plastic monomer and concrete is increased, so that the heat exchange effect of the concrete-replacing plastic monomer is improved.
In another embodiment of the present application, as shown in fig. 7:
the surface of a frustum bottom plate 202 of the plastic shell B protrudes outwards to form a middle supporting foot strip 203; this support leg strip is "three fork star" structure, and the plastic casing B that this kind of set up can be convenient for tentatively fix for concrete plastics monomer to form good contact with the concrete at the concrete placement in-process, also be favorable to increasing concrete and plastic casing B's area of contact, with improve heat exchange efficiency, effectively reduce the loss of heat energy.
In another embodiment of the present application, as shown in fig. 6:
the inner side of the top of the spherical surface of the plastic shell A1 is provided with an annular rib plate 5, and the inner spherical surface of the plastic shell A1 is provided with reinforcing rib plates 6 which extend from the annular rib plate 5 to the supporting turned edge 8 at equal intervals in the circumferential direction; the plastic shell A can effectively improve the structural strength of the plastic shell A through the annular rib plate and the reinforcing rib plate which are arranged in the plastic shell A, and improve the integral compressive strength of the concrete-substituted plastic monomer, so that the concrete can not be sunken and deformed to cause the functional loss in the pouring process.
In another embodiment of the present application, as shown in fig. 8:
an annular rib plate 5 is arranged at the center of the inner side of a frustum bottom plate 202 of the plastic shell B, and reinforcing rib plates 6 are arranged at equal intervals along the annular rib plate 5 to the edge of the inner side of the frustum bottom plate 202 in the circumferential direction; a plurality of triangular rib plates 7 are circumferentially arranged on the inner side of the frustum coaming 201 at equal intervals, and the triangular rib plates 7 extend from the edge of the frustum bottom plate 202 to the upper edge of the frustum coaming 201; the plastic shell B can effectively improve the structural strength of the plastic shell B through the annular rib plate, the reinforcing rib plate and the triangular rib plate which are arranged in the plastic shell B, and improve the integral compressive strength of the concrete-substituted plastic monomer, so that the concrete can not be sunken and deformed to cause the functional loss of the concrete in the pouring process.
In another embodiment of the present application, as in FIGS. 1-8:
the plastic shell A1 or the plastic shell B2 is provided with air holes 4; the plastic shell consists of a plastic shell A or/and a plastic shell B.
In another embodiment of the present application, as shown in fig. 9:
a plurality of reinforcing ribs 212 are arranged on the outer side of the plate body of the groove-shaped fastener 211 along the width direction of the groove-shaped fastener; the connecting piece 200 has high strength, and is not only favorable for realizing the positioning connection of two adjacent concrete plastic monomers, but also favorable for combining with concrete by the reinforcing ribs arranged on the groove-shaped fastener, thereby avoiding more cavities from occurring in the pouring process of a floor slab or a roof and improving the structural strength of the floor slab or the roof under the premise of reducing the weight of the concrete.
The utility model discloses a working method or theory of operation:
the concrete-replacing plastic structure comprises a plurality of concrete-replacing plastic single bodies, wherein the concrete-replacing plastic single bodies adopt plastic shells with different structure types and are spliced into a closed concrete-replacing plastic single body through the plastic shells; the plastic shell forming the concrete-substitute plastic monomer is internally provided with a reinforcing structure to improve the structural strength of the concrete-substitute plastic monomer, and the surface of the plastic shell forming the concrete-substitute plastic monomer is provided with a concave part, a concave groove part or a supporting foot bar, so that the concrete can be fully contacted, and the heat exchange performance and the stability of the concrete-substitute plastic monomer are improved.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating the inside of two elements or for interacting with each other, unless otherwise specifically defined, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to the specific circumstances.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A hollow structure replaces concrete working of plastics, its characterized in that: comprises a plurality of groups of concrete-substituted plastic monomers (100) and connecting pieces (200);
the concrete-replacing plastic monomer (100) comprises two groups of plastic shells, the plastic shells are of an open semi-closed structure, the circumference of the open of each plastic shell protrudes outwards to form a supporting turned edge (8), a plurality of shoveling buckles (3) are arranged along the outer edge of the circumference of the supporting turned edge (8), and the shoveling buckles (3) are perpendicular to the supporting turned edge (8);
the shovel buckle (3) comprises a buckle block (301) protruding upwards to support the upper end of the turning edge and a clamping part protruding downwards to support the lower end of the turning edge and connected with the plastic shell, and a connecting groove (302) is arranged in the clamping part;
the supporting turned edges (8) of the two groups of plastic shells are relatively attached and fixedly buckled and connected through the shovel buckles (3);
the connecting piece (200) is a groove-shaped fastener (211), and two ends of the groove-shaped fastener (211) are respectively buckled in the connecting grooves (302) of two adjacent concrete-replacing plastic structures.
2. A hollow structural replacement concrete plastic member as claimed in claim 1 wherein: the two groups of plastic shells are respectively a plastic shell A (1);
the plastic shell A (1) is a semi-oblate shell (101), and the two groups of plastic shells A (1) are buckled to form a oblate structure.
3. A hollow structural replacement concrete plastic member as claimed in claim 1 wherein: the two groups of plastic shells are respectively a plastic shell A (1) and a plastic shell B (2);
the plastic shell A (1) is a semi-oblate spheroid shell (101); the plastic shell B (2) is of a frustum-shaped structure, and the plastic shell B (2) comprises a frustum enclosing plate (201) and a frustum bottom plate (202) arranged at the bottom of the frustum enclosing plate; the plastic shell A (1) and the plastic shell B (2) are buckled to form a concrete-replacing plastic structure.
4. A hollow structural replacement concrete part according to claim 1 wherein: the two groups of plastic shells are respectively plastic shells B (2);
the plastic shell B (2) is of a frustum-shaped structure, and the plastic shell B (2) comprises a frustum coaming (201) and a frustum bottom plate (202) arranged at the bottom of the frustum coaming; the two groups of plastic shells B (2) are buckled to form a plastic structure for replacing concrete.
5. A hollow structural plastic substitute part according to claim 2 or 3 wherein: the top of the spherical surface of the plastic shell A (1) is inwards sunken to form a concave part (102), and concave groove parts (103) from the concave part (102) to the supporting turning edge (8) are arranged on the spherical surface of the plastic shell A (1) at equal intervals in the circumferential direction.
6. A hollow structural plastic substitute part according to claim 3 or 4, wherein: the surface of a frustum bottom plate (202) of the plastic shell B is outwards protruded to form a middle supporting foot strip (203).
7. A hollow structural plastic substitute part according to claim 2 or 3 wherein: the inner side of the top of the spherical surface of the plastic shell A (1) is provided with an annular rib plate (5), and the inner spherical surface of the plastic shell A (1) is circumferentially provided with reinforcing rib plates (6) which extend from the annular rib plate (5) to the supporting turned edge (8) at equal intervals.
8. A hollow structural plastic substitute part according to claim 3 or 4, wherein: an annular rib plate (5) is arranged at the center of the inner side of a frustum bottom plate (202) of the plastic shell B, and reinforcing rib plates (6) are arranged at equal intervals along the annular rib plate (5) to the edge of the inner side of the frustum bottom plate (202) in the circumferential direction;
a plurality of triangular rib plates (7) are arranged on the inner side of the frustum coaming (201) in the circumferential direction at equal intervals, and the triangular rib plates (7) extend from the edge of the frustum bottom plate (202) to the upper edge of the frustum coaming (201).
9. A hollow structural plastic replacement part according to any one of claims 2 to 4 wherein: the plastic shell A (1) or the plastic shell B (2) is provided with an air hole (4).
10. A hollow structural replacement concrete plastic member as claimed in claim 1 wherein: the outer side of the plate body of the groove-shaped fastener (211) is provided with a plurality of reinforcing ribs (212) along the width direction of the groove-shaped fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221096199.9U CN217326153U (en) | 2022-05-09 | 2022-05-09 | Hollow structure's substitute concrete working of plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221096199.9U CN217326153U (en) | 2022-05-09 | 2022-05-09 | Hollow structure's substitute concrete working of plastics |
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| CN217326153U true CN217326153U (en) | 2022-08-30 |
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| CN202221096199.9U Active CN217326153U (en) | 2022-05-09 | 2022-05-09 | Hollow structure's substitute concrete working of plastics |
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