CN113622617A - Plastic expansion pipe for fixing building hanging parts - Google Patents
Plastic expansion pipe for fixing building hanging parts Download PDFInfo
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- CN113622617A CN113622617A CN202110919389.XA CN202110919389A CN113622617A CN 113622617 A CN113622617 A CN 113622617A CN 202110919389 A CN202110919389 A CN 202110919389A CN 113622617 A CN113622617 A CN 113622617A
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- plastic
- pipe
- fixing
- plastic pipe
- groove
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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
- E04F13/0801—Separate fastening elements
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- Structural Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention discloses a plastic expansion pipe for fixing a building pendant, which comprises a plastic pipe, wherein a fixing mechanism for assisting the fixation of the plastic pipe is arranged in the plastic pipe, the fixing mechanism comprises a semicircular block, the semicircular block is fixedly arranged on the left side surface and the right side surface of the plastic pipe, the lower ends of the left side surface and the right side surface of the plastic pipe are provided with semicircular clamping grooves, the semicircular clamping grooves are positioned at the lower ends of the semicircular block, the front surface of the plastic pipe is provided with an elongated slot penetrating through the plastic pipe, and a round cap is fixedly arranged on the plastic pipe. The blocking force is larger, and the fixing effect of the plastic expansion pipe is improved.
Description
Technical Field
The application relates to the technical field of building decoration, in particular to a plastic expansion pipe for fixing a building pendant.
Background
The wall stone construction method in the building decoration at present comprises a wet pasting method, a hanging pasting method and a dry hanging method. The wet pasting method is that after the wall surface is plastered and leveled, the stone is pasted on the plastering surface of the wall body by cement mortar or cement mortar mixed with building glue, the bonding force of the cement mortar is low, and the stone generally has heavy weight, so the stone bonding failure and the falling accident are easy to happen; the cement mortar plastering layer has the phenomenon of bonding failure caused by low bonding force with the base layer, and the plastering layer is easy to generate hollowing phenomenon under the influence of thermal expansion and cold contraction and building deformation along with the passage of time, so that the bonding failure phenomenon of the plastering layer and the base layer is aggravated, and the stone bonding layer of the surface layer falls off; the cement mortar bonding layer is easy to generate the phenomenon of 'saltpetering', so that the surface of the stone is locally whitened, and the decoration effect of the surface of the stone is influenced. The hanging and sticking method is characterized in that a copper wire fixing piece is added at the top end of the stone on the basis of a wet sticking method, and the fixing piece is nailed into the wall body through a steel nail, so that the method has a small application range, only the concrete base layer can be fixed by adopting the steel nail, the filler wall masonry body is built by adopting hollow bricks, perforated bricks and the like, and the nail head is easy to hang after the steel nail is nailed, so that the suspension force of the steel nail is influenced; secondly, the process also produces a "saltpetering" phenomenon. The dry hanging method is wide in application range and safe and reliable in construction, is a wall stone construction method widely adopted at present, dry hanging pieces are widely applied to the wall decoration industry and used for hanging decorative stones such as marble, the stones must be neatly drawn for the sake of attractiveness, the dry hanging pieces serve as intermediate media of a wall body and the stones, the requirements of angles, sizes and positions of each single dry hanging piece and the stones and the wall body must be consistent, the steel nails are used for fixing the hanging pieces in a hanging and sticking method or a dry sticking method, an expansion pipe is required for fixing the hanging pieces by using the steel nails, and the structure, strength, length and expansion coefficient of the expansion pipe influence the fixing effect of the steel nails.
As disclosed in the chinese patent: the utility model provides a fixed plastics expansion pipe of using of building pendant, publication no: CN206309724U, the plastic expansion pipe of the invention not only can meet the use requirements, but also can be suitable for various media with different expansion coefficients, has wider application range and more convenient use, but when the expansion pipe is used, the screw is in the expansion pipe, when the expansion pipe receives external force, the fixing effect is not ideal, and when the expansion pipe is installed in a preset hole, the inserted resistance is larger, and the insertion is more inconvenient.
Disclosure of Invention
The invention aims to provide a plastic expansion pipe for fixing a building pendant, which aims to solve the problems in the background technology.
The embodiment of the application adopts the following technical scheme:
the utility model provides a fixed plastic expansion pipe of using of building pendant, includes the plastic tubing, be equipped with the fixed establishment of supplementary plastic tubing in the plastic tubing, fixed establishment includes the semicircle piece, semicircle piece fixed mounting is in the side about the plastic tubing, semicircle draw-in groove has been seted up to side lower extreme about the plastic tubing, semicircle draw-in groove is located the lower extreme of semicircle piece, the elongated slot that runs through the plastic tubing is seted up in the front of plastic tubing, the higher authority fixed mounting of plastic tubing has the round cap, the lower fixed surface of plastic tubing installs circular hood, the round hole has been seted up to the upper surface of round cap, the round hole runs through whole plastic tubing.
Preferably, a connecting piece is arranged in the plastic pipe and comprises a thread groove, and the thread groove is formed in the inner wall of the plastic pipe.
Preferably, the plastic pipe is provided with a fixing mechanism for fixing screws, the fixing mechanism comprises a rectangular groove, the rectangular groove is formed in the left side surface and the right side surface of the upper end of the round hole, a plastic bag is fixedly mounted in the rectangular groove, the section of the long groove is wavy, and the size of the semicircular block is matched with that of the semicircular clamping groove.
Preferably, four groups of triangular blocks are fixedly arranged below the round cap, are distributed in a circumferential manner and are fixedly arranged on the side wall of the plastic pipe.
Preferably, fixed mounting has the edging piece below the circular hood, set up the rectangle extrusion groove that is the circumference and distributes on the edging piece, movable mounting has the slide bar in the edging piece, the different fixed mounting in both sides tip of slide bar has disc and contact pin, the disc sets up in the inner chamber of plastic tubing, the contact pin sets up outside the plastic tubing, the semicircle groove has been seted up to the upper surface of disc, the semicircle groove forms the bullport to the bolt, the edging piece sets up the cutting piece on deviating from the notch position of circular hood.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
when the plastic pipe is inserted, the semicircular block receives resistance from the hole, the resistance in the hole pushes the semicircular block to move backwards, the semicircular block can move towards the semicircular clamping groove, the resistance when the plastic pipe is inserted is reduced, the screw to be driven is driven into the plastic pipe, the screw moves towards the plastic pipe through the circular hole, the screw is in threaded fit with the threaded groove, so that when the screw receives outward force, reverse pulling force can be generated, when the screw is inserted into the plastic pipe, outward extrusion force is applied to the plastic pipe by the screw, after the internal stress of the plastic pipe, the plastic pipe is subjected to expansion and fracture from the elongated groove, the radius of the plastic pipe is increased, the long groove is wavy, the area of the long groove is larger when the plastic pipe is subjected to expansion crack, the expansion crack amplitude is larger, the expansion effect is good, when the plastic pipe receives outward force, the expansion crack at the long groove and the shape of the semicircular block can generate reverse force to block the outward movement of the screw, the device blocks the force through the groove formed in the outer side surface of the plastic pipe when the screw receives the outward force, and the fixing effect of the plastic expansion pipe is improved.
Secondly, when using, when the screw inserts the round hole in, the screw can take the plastic bag to carry out the screw thread removal in the round hole, the plastic bag can be along with the removal card of screw in the thread groove, realize more stable connection between screw and the thread groove, when the screw received outside power, the plastic bag in the thread groove can improve reverse power that blocks, the existence of plastic bag is passed through to this device, at the in-process that the screw outwards removed, produce reverse resistance, further improvement the fixed effect of plastics inflation pipe.
Thirdly, when the plastic pipe is placed into a preset hole in a building wall surface, the edge grinding piece on the plastic pipe can firstly contact with the side wall of the preset hole, the notch of the edge grinding piece is of a blade structure, when the edge grinding piece moves in the preset hole, the inside of the preset hole can be scraped, the preset hole is cleaned, sundries on the hole wall are prevented from influencing the installation of the plastic pipe, the radius of the edge grinding piece is smaller than that of the plastic pipe, the normal installation of the plastic pipe cannot be influenced, the friction force between the edge grinding piece and the preset hole can be reduced by a rectangular extrusion groove in the plastic pipe, after the plastic pipe is installed, a screw for installation is inserted into the plastic pipe, the head of the screw is clamped in a semicircular groove in a disc, pressure is applied to the disc through the movement of the screw on the plastic pipe, the disc drives a slide rod to move in a circular top cap, and the movement of the slide rod drives the contact pin to move, realize the further block of contact pin and wall, improve the intensity of plastic tubing installation, predetermine the installation in hole through contact pin and wall, improved the installation stability of plastic tubing.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic structural view of the top of the present invention;
FIG. 4 is a schematic structural view of the bottom of the present invention;
FIG. 5 is a schematic view of the configuration of the edging according to the invention;
FIG. 6 is a schematic view of a specific configuration of the edging according to the invention;
FIG. 7 is a bottom view of the edging according to the present invention.
In the figure: 1. a plastic tube; 2. a circular hole; 3. a round cap; 11. a semicircular block; 12. a semicircular clamping groove; 13. a long groove; 14. a circular top cap; 15. a triangular block; 21. a rectangular groove; 22. a plastic bag; 23. a thread groove; 31. grinding an edge part; 32. a rectangular extrusion groove; 33. a disc; 34. inserting a pin; 35. a slide bar; 36. a semicircular groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example 1: referring to fig. 1, 2 and 4, a plastic expansion pipe for fixing a building pendant comprises a plastic pipe 1, a fixing mechanism for assisting the fixation of the plastic pipe 1 is arranged in the plastic pipe 1, the fixing mechanism comprises a semicircular block 11, the semicircular block 11 is fixedly arranged on the left side surface and the right side surface of the plastic pipe 1, a semicircular clamping groove 12 is formed in the lower end of the left side surface and the right side surface of the plastic pipe 1, the semicircular clamping groove 12 is located at the lower end of the semicircular block 11, an elongated groove 13 penetrating through the plastic pipe 1 is formed in the front surface of the plastic pipe 1, a circular cap 3 is fixedly arranged on the upper surface of the plastic pipe 1, a circular top cap 14 is fixedly arranged on the lower surface of the plastic pipe 1, a circular hole 2 is formed in the upper surface of the circular cap 3, the circular hole 2 penetrates through the whole plastic pipe 1, a connecting piece is arranged in the plastic pipe 1, the connecting piece comprises a thread groove 23, and the thread groove 23 is formed in the inner wall of the plastic pipe 1.
Four groups of triangular blocks 15 are fixedly arranged below the round cap 3, the four groups of triangular blocks 15 are distributed in a circumferential manner, and the triangular blocks 15 are fixedly arranged on the side wall of the plastic pipe 1.
When using, strike plastic tubing 1 and insert the inslot that predetermines in advance, triangular block 15 can support circular cap 3, prevents that circular cap three from taking place deformation, also can play same effect when follow-up inserted screw.
When the plastic pipe 1 is inserted, the semicircular block 11 receives resistance from the hole, the resistance in the hole pushes the semicircular block 11 to move backwards, the semicircular block 11 moves towards the semicircular clamping groove 12 to reduce the resistance when the plastic pipe 1 is inserted, when a screw to be driven is driven into the plastic pipe 1, the screw moves towards the plastic pipe 1 through the circular hole 2 and is in threaded fit with the thread groove 23, so that when the screw receives outward force, reverse pulling force can be generated, meanwhile, when the screw is inserted into the plastic pipe 1, outward extrusion force is applied to the plastic pipe 1 by the screw, after the plastic pipe 1 is stressed, the plastic pipe 1 is subjected to expansion and cracking from the long groove 13, the radius of the plastic pipe 1 is increased, the long groove 13 is wavy, when the expansion and cracking occurs, the area of the long groove 13 is larger, the expansion and cracking amplitude is larger, and the expansion and cracking effect is good, when the plastic pipe 1 receives an outward force, the expansion crack at the position of the long groove 13 and the shape of the semicircular block 11 can generate a reverse force to block the outward movement of the screw.
Example 2: referring to fig. 3, on the basis of the first embodiment, the plastic tube 1 is provided with a fixing mechanism for fixing screws, the fixing mechanism includes a rectangular groove 21, the rectangular groove 21 is formed on the left and right side surfaces of the upper end of the circular hole 2, a plastic bag 22 is fixedly installed in the rectangular groove 21, the cross-sectional shape of the elongated groove 13 is wavy, and the size of the semicircular block 11 is matched with the size of the semicircular clamping groove 12.
When using, when the screw inserts in round hole 2, the screw can take plastic bag 22 to carry out the screw thread to remove in the round hole 2, plastic bag 22 can be along with the removal card of screw in thread groove 23, realize more stable connection between screw and the thread groove 23, when the screw received outside power, plastic bag 22 in thread groove 23 can improve reverse power of blockking, the existence of plastic bag 22 is passed through to this device, at the in-process of the outside removal of screw, produce reverse resistance, further improvement the fixed effect of plastics inflation pipe.
Example 3: referring to fig. 1, 5, 6 and 7, on the basis of the first embodiment, an edge grinding member 31 is fixedly installed below the circular top cap 14, rectangular extrusion grooves 32 distributed circumferentially are formed in the edge grinding member 31, a slide bar 35 is movably installed in the edge grinding member 31, two side ends of the slide bar 35 are respectively and fixedly installed with a disc 33 and a pin 34, the disc 33 is arranged in an inner cavity of the plastic tube 1, the pin 34 is arranged outside the plastic tube 1, a semicircular groove 36 is formed in the upper surface of the disc 33, the semicircular groove 36 forms a guide hole for a bolt, and a cutting piece is arranged on a notch part of the edge grinding member 31, which is far away from the circular top cap 14.
When the plastic pipe 1 is placed into a preset hole in a building wall surface, the edge grinding piece 31 on the plastic pipe 1 firstly contacts with the side wall of the preset hole, the notch of the edge grinding piece 31 is of a blade structure, when the edge grinding piece 31 moves in the preset hole, the inside of the preset hole can be scraped, the preset hole is cleaned, sundries on the hole wall are prevented from influencing the installation of the plastic pipe, the radius of the edge grinding piece 31 is smaller than that of the plastic pipe 1 and cannot influence the normal installation of the plastic pipe 1, the rectangular extrusion groove 32 on the plastic pipe 1 can reduce the friction force between the edge grinding piece 31 and the preset hole, after the installation of the plastic pipe 1 is completed, a screw for installation is inserted into the plastic pipe 1, the head of the screw is clamped in the semicircular groove 36 on the disc 33, pressure is applied to the disc 33 through the movement of the screw on the plastic pipe 1, the disc 33 drives the slide rod 35 to move in the circular top cap 14, the movement of slide bar 35 drives the removal of contact pin 34, realizes the further block of contact pin 34 and wall, improves the intensity of plastic tubing 1 installation, through the installation of contact pin 34 and the wall preset hole, has improved the installation stability of plastic tubing 1.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
It should also be noted that 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 like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (9)
1. The utility model provides a fixed plastic expansion pipe that uses of building pendant, includes plastic tubing (1), its characterized in that: a fixing mechanism for assisting the fixing of the plastic pipe (1) is arranged in the plastic pipe (1), the fixing mechanism comprises a semicircular block (11), the semicircular block (11) is fixedly arranged on the left side surface and the right side surface of the plastic pipe (1), the lower end of the left side surface and the right side surface of the plastic pipe (1) is provided with a semicircular clamping groove (12), the semicircular clamping groove (12) is positioned at the lower end of the semicircular block (11), and the front surface of the plastic pipe (1) is provided with an elongated slot (13) penetrating through the plastic pipe (1);
a connecting piece is arranged in the plastic pipe (1);
and a fixing mechanism for fixing the screw is arranged on the plastic pipe (1).
2. The plastic expansion pipe for fixing the building hanging parts according to claim 1, wherein: the plastic pipe is characterized in that a round cap (3) is fixedly mounted on the plastic pipe (1), a round top cap (14) is fixedly mounted on the lower surface of the plastic pipe (1), a round hole (2) is formed in the upper surface of the round cap (3), and the round hole (2) penetrates through the whole plastic pipe (1).
3. The plastic expansion pipe for fixing the building hanging parts according to claim 1, wherein: the connecting piece comprises a thread groove (23), and the thread groove (23) is arranged on the inner wall of the plastic pipe (1).
4. The plastic expansion pipe for fixing the building hanging parts according to claim 1, wherein: the fixing mechanism comprises a rectangular groove (21), the rectangular groove (21) is arranged on the left side face and the right side face of the upper end of the round hole (2), and a plastic bag (22) is fixedly arranged in the rectangular groove (21).
5. The plastic expansion pipe for fixing the building hanging parts according to claim 1, wherein: the section of the long groove (13) is wavy, and the size of the semicircular block (11) is matched with that of the semicircular clamping groove (12).
6. The plastic expansion pipe for fixing the building hanging parts according to claim 2, wherein: four groups of triangular blocks (15) are fixedly installed below the round cap (3), the four groups of triangular blocks (15) are distributed in a circumferential mode, and the triangular blocks (15) are fixedly installed on the side wall of the plastic pipe (1).
7. The plastic expansion pipe for fixing the building hanging parts according to claim 2, wherein: an edge grinding piece (31) is fixedly mounted below the circular top cap (14), and rectangular extrusion grooves (32) which are distributed circumferentially are formed in the edge grinding piece (31).
8. The plastic expansion pipe for fixing the building hanging parts according to claim 7, wherein: the plastic tube edge grinding machine is characterized in that a sliding rod (35) is movably mounted in the edge grinding piece (31), a disc (33) and a contact pin (34) are respectively and fixedly mounted at two side ends of the sliding rod (35), the disc (33) is arranged in an inner cavity of the plastic tube (1), and the contact pin (34) is arranged outside the plastic tube (1).
9. The plastic expansion pipe for fixing the building hanging parts according to claim 8, wherein: semicircular groove (36) have been seted up to the upper surface of disc (33), semicircular groove (36) form the guide hole to the bolt, set up the cutting piece on edging piece (31) deviates from the notch position of circular hood (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110919389.XA CN113622617A (en) | 2021-08-11 | 2021-08-11 | Plastic expansion pipe for fixing building hanging parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110919389.XA CN113622617A (en) | 2021-08-11 | 2021-08-11 | Plastic expansion pipe for fixing building hanging parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113622617A true CN113622617A (en) | 2021-11-09 |
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ID=78384470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110919389.XA Pending CN113622617A (en) | 2021-08-11 | 2021-08-11 | Plastic expansion pipe for fixing building hanging parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113622617A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3445520A1 (en) * | 1984-12-13 | 1986-06-19 | Hilti Ag, Schaan | PLASTIC SPREADING DOWEL |
| JPH05202915A (en) * | 1991-10-16 | 1993-08-10 | Prospection & Inventions Techniques Spit:Soc | Pin to be driven in wall or the like |
| CN1682036A (en) * | 2002-08-08 | 2005-10-12 | 特纳知识产权有限公司 | Fixing plug |
| CN201158868Y (en) * | 2008-01-08 | 2008-12-03 | 北京住总集团有限责任公司 | Steel wire gauze locating anchorage member especially for exterior heat preservation |
| CN201436410U (en) * | 2009-05-21 | 2010-04-07 | 亚士漆(上海)有限公司 | T-shaped anchor |
| CN103615452A (en) * | 2013-12-03 | 2014-03-05 | 居万里 | Countersunk head type self-reaming expansion anchor bolt |
| CN111022458A (en) * | 2019-11-19 | 2020-04-17 | 承庚机械科技(上海)有限公司 | Tear open formula pin structure open |
| CN211075353U (en) * | 2019-06-06 | 2020-07-24 | 丁悦 | Bridging structure of three-dimensional relief sculpture of wood carving |
| CN212506820U (en) * | 2020-01-17 | 2021-02-09 | 中航天建设工程集团有限公司 | Plate anchoring part |
| CN213839187U (en) * | 2020-10-29 | 2021-07-30 | 中建八局第一建设有限公司 | Auxiliary connecting piece for plastic expansion plug |
-
2021
- 2021-08-11 CN CN202110919389.XA patent/CN113622617A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3445520A1 (en) * | 1984-12-13 | 1986-06-19 | Hilti Ag, Schaan | PLASTIC SPREADING DOWEL |
| JPH05202915A (en) * | 1991-10-16 | 1993-08-10 | Prospection & Inventions Techniques Spit:Soc | Pin to be driven in wall or the like |
| CN1682036A (en) * | 2002-08-08 | 2005-10-12 | 特纳知识产权有限公司 | Fixing plug |
| CN201158868Y (en) * | 2008-01-08 | 2008-12-03 | 北京住总集团有限责任公司 | Steel wire gauze locating anchorage member especially for exterior heat preservation |
| CN201436410U (en) * | 2009-05-21 | 2010-04-07 | 亚士漆(上海)有限公司 | T-shaped anchor |
| CN103615452A (en) * | 2013-12-03 | 2014-03-05 | 居万里 | Countersunk head type self-reaming expansion anchor bolt |
| CN211075353U (en) * | 2019-06-06 | 2020-07-24 | 丁悦 | Bridging structure of three-dimensional relief sculpture of wood carving |
| CN111022458A (en) * | 2019-11-19 | 2020-04-17 | 承庚机械科技(上海)有限公司 | Tear open formula pin structure open |
| CN212506820U (en) * | 2020-01-17 | 2021-02-09 | 中航天建设工程集团有限公司 | Plate anchoring part |
| CN213839187U (en) * | 2020-10-29 | 2021-07-30 | 中建八局第一建设有限公司 | Auxiliary connecting piece for plastic expansion plug |
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Application publication date: 20211109 |