Installation method of dome-shaped glass curtain wall
By dividing the glass inside the dome frame and using vertical hoisting equipment, the deformation problem during the hoisting of large-span dome structure glass curtain walls was solved, achieving a safe and efficient installation process and reducing construction difficulty and cost.
Patent Information
- Application Number
- CN202310958057.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2043-07-31
AI Technical Summary
Large-span dome-shaped glass curtain walls are prone to deformation due to their own weight during hoisting, and existing technologies cannot effectively prevent glass deformation and simplify the installation process.
The dome's internal truss installation method is adopted, dividing the dome glass into a central glass and a ring glass. The glass is then vertically lifted to the installation window using hoisting equipment and secured with suction cups and straps. This is combined with simple hoisting equipment for vertical installation, avoiding horizontal movement.
This reduces the risk of glass deformation, lowers the capacity requirements for hoisting equipment, simplifies the construction process, and reduces construction difficulty and cost.
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Figure CN116971621B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of large-span dome structures, and in particular to a method for installing a glass curtain wall of a dome structure. Background Technology
[0002] The surface of the large-span dome structure is a hyperboloid, giving the building a beautiful shape and a grand and solemn impression. To make the interior of the building more transparent, skylights are often installed at the top of the dome structure.
[0003] In the construction of glass curtain walls for existing large-span dome structures, the glass is generally placed horizontally to ensure its stability during the construction of the skylight curtain wall in the center of the dome, which is a hyperbolic curved surface. The glass is then hoisted from the outside of the dome structure along the curved surface to the skylight using hoisting equipment. However, the glass lacks support at the bottom during the hoisting process and is prone to deformation under its own weight. Summary of the Invention
[0004] In order to reduce the deformation of skylight glass during hoisting and keep the glass intact for easy installation, this application provides an installation method for a dome-structured glass curtain wall.
[0005] This application provides a method for installing a dome-shaped glass curtain wall, which adopts the following technical solution:
[0006] An installation method for a dome-shaped glass curtain wall includes the following steps:
[0007] A dome-shaped space frame is provided, wherein the dome-shaped space frame is hollow and has an installation window at the top;
[0008] Glass curtain wall installation: Provide dome glass and hoisting equipment. Use the hoisting equipment to hoist the dome glass from the storage position inside the dome frame to the installation window. The storage position is located below the installation window. Keep the dome glass vertical during transportation and hoisting, and install the dome glass on the dome frame.
[0009] By adopting the above technical solution, since the installation location of the dome glass is located at the center of the top of the dome frame, the dome glass can be stored directly inside the building. It can then be vertically lifted to the installation window using hoisting equipment. This shortens the hoisting path, reduces the time required for hoisting, and eliminates the need for horizontal movement of the dome glass during hoisting. Simultaneously, the dome glass is kept vertical during transport to minimize deformation and damage.
[0010] Optionally, the steps for installing a glass curtain wall include:
[0011] Hoisting the annular glass: Provide an annular glass, use the hoisting equipment to hoist the annular glass from its storage position inside the dome frame to the installation window, and install the annular glass on the dome frame;
[0012] Central glass installation: A central glass is provided, and the central glass is hoisted from its storage position inside the dome frame to the installation window using the hoisting equipment. The central glass is then installed in the middle of the annular glass to form the dome glass.
[0013] By adopting the above technical solution, since the dome frame is hollow inside, the self-weight of the dome glass is supported only by the connection between the edges and the dome frame. Dividing the dome glass into central glass and annular glass and hoisting them separately can reduce the span of the dome glass, making the structure safer; and it can reduce the weight of each hoisting, thus reducing the capacity requirements of the hoisting equipment.
[0014] Optionally, the steps for hoisting the ring-shaped glass include:
[0015] Multiple sections of annular glass are provided. The hoisting equipment is used to hoist the annular glass from its storage position inside the dome frame to the installation window. The annular glass sections are hoisted one after another and spliced together to form the annular glass.
[0016] By adopting the above technical solution, the annular glass is divided into multiple annular sections. Firstly, this reduces the load on each hoisting operation. Secondly, although the cavity in the center of the annular glass is weightless, it occupies a significant amount of space. Therefore, hoisting the entire annular glass requires multiple lifting points evenly distributed along its circumference to maintain stability during the hoisting process. Hoisting the segmented annular glass sections individually further reduces the number of lifting points, making it even more conducive to maintaining glass stability.
[0017] Optionally, "using the hoisting equipment to hoist the dome glass from its storage location inside the dome frame to the installation window" includes:
[0018] The hoisting equipment includes a lifting mechanism, a suction cup, and straps. The dome glass is attached to the suction cup, and the dome glass is tied and fixed to the suction cup with the straps.
[0019] Activate the lifting mechanism to lift the suction cup, so that the dome glass faces horizontally downwards towards the installation window, and install the dome glass onto the dome frame.
[0020] By adopting the above technical solution, since the glass sheet does not have the conditions for setting up lifting rings, commonly used hooks are not suitable for lifting glass sheets. Considering the smooth surface of the glass sheet, suction cups are used to adhere and fix it to the glass sheet, and straps are used to bind it to prevent the glass from falling. Therefore, there is no need to set up additional lifting rings, making the lifting process much simpler.
[0021] Optionally, the step of "lifting the suction cup so that the dome glass faces horizontally downwards towards the mounting window, and installing the dome glass onto the dome frame" includes:
[0022] Lift the suction cup upwards. After the top of the dome glass protrudes from the mounting window, gradually rotate the suction cup while lifting the dome glass upwards, so that the dome glass becomes horizontal and positioned above the mounting window.
[0023] By adopting the above technical solution, after the top of the dome glass protrudes from the installation window, the suction cup can be gradually rotated while the dome glass is lifted upwards, which can shorten the lifting distance and time and improve the lifting efficiency.
[0024] Optionally, before the step of "using the hoisting equipment to hoist the dome glass from its storage location inside the dome frame to the installation window", the method further includes:
[0025] Erecting hoisting equipment: Fix the hoisting equipment to the top of the dome frame so that the hoisting equipment is directly above the installation window.
[0026] By adopting the above technical solution, which involves hoisting the dome glass from inside the dome frame, only vertical lifting is required, eliminating the need for horizontal movement of the dome glass. Therefore, simpler, less expensive hoisting equipment can be installed on top of the dome frame, reducing the capacity requirements of the hoisting equipment and saving costs.
[0027] Optionally, the step of “providing a dome grid” includes: providing multiple annular layers, wherein the multiple annular layers are concentrically stacked, the outer peripheral walls of the annular layers have vertical mounting openings, and adjacent annular layers are fixedly connected to form the dome grid.
[0028] The steps of “installing the glass curtain wall” also include: providing curtain wall units, using the hoisting equipment to hoist the curtain wall units to the vertical installation opening, and installing the curtain wall units on the annular layer.
[0029] By adopting the above technical solution, a dome grid structure consisting of multiple concentrically stacked steel frame layers is provided, and the curved surface of the dome structure is differentiated. The curtain wall units are vertically installed on the outer perimeter walls of each level of the annular layer, eliminating the need for adjusting the glass angle according to the dome's curvature in traditional hyperbolic dome structures. This simplifies the installation of large-span dome glass curtain walls and effectively reduces construction difficulty. Furthermore, the flat surface at the top of the annular layer can be used as a construction platform for temporary material storage and facilitates worker standing and movement.
[0030] Optionally, the step of providing the curtain wall unit includes: providing a glass panel and a connecting frame, wherein the glass panel is fitted and fixed within the connecting frame to form the curtain wall unit;
[0031] The steps of "using the hoisting equipment to hoist the curtain wall unit to the vertical installation opening and installing the curtain wall unit on the annular layer" include: connecting and fixing the connecting frame to the annular layer.
[0032] By adopting the above technical solution, the glass panels and connecting frames are assembled into curtain wall units and then hoisted and installed as a whole. This eliminates the need for direct connection of the glass panels during on-site construction, thereby shortening on-site construction time and reducing glass damage caused by accidents during on-site operations. During the transportation and stacking of curtain wall units, the connecting frames also protect the glass panels, thus preventing damage caused by collisions between the glass panels.
[0033] Optionally, before the step of "using the hoisting equipment to hoist the curtain wall unit to the vertical installation opening", the method further includes:
[0034] Multiple lifting lugs are provided, and the multiple lifting lugs are fixed at intervals along the perimeter of the connecting frame to the top of the connecting frame, connecting the lifting equipment to the lifting lugs.
[0035] By adopting the above technical solution, setting multiple lifting lugs along the top of the connecting frame can increase the number of lifting points, making the stress on the curtain wall unit more uniform.
[0036] Optionally, the step of "fixing the plurality of the lifting lugs at circumferential intervals to the top of the connecting frame" further includes:
[0037] The lug is hinged to the connecting frame. When the lug is rotated to fit against the top surface of the connecting frame, the projection of the lug on the connecting frame is located within the connecting frame.
[0038] The common method for connecting lifting lugs to the components being lifted is welding. The lugs are then cut off after the glass curtain wall is installed. Because the lugs protrude outwards, this causes problems with storing the lifted components during material stacking or transportation. By adopting the above technical solution, the connection between the lifting lugs and the connecting frame is changed to a hinged connection. This not only allows for force transmission during lifting, but also enables the lugs to rotate and position horizontally above the connecting frame when the curtain wall unit needs to be stored, reducing space occupation and making the curtain wall unit easier to store.
[0039] In summary, this application includes at least one of the following beneficial technical effects:
[0040] 1. By storing the dome glass inside the dome frame and using hoisting equipment to vertically lift the dome glass to the installation window, the hoisting path is shortened and the process of horizontally moving the dome glass during hoisting is eliminated; during the hoisting process, the dome glass is kept vertical, minimizing the bending and deformation of the glass panel under gravity.
[0041] 2. By providing a dome grid structure composed of multiple concentrically stacked annular layers, the curved surface of the dome structure is differentiated. The curtain wall units are vertically installed on the outer perimeter of each annular layer, eliminating the need to adjust the glass angle according to the curvature of the dome in the original hyperbolic dome structure. This simplifies the installation of large-span dome structure glass curtain walls and effectively reduces the difficulty of construction operations.
[0042] 3. By splitting the dome glass into a central glass panel and an annular glass panel and hoisting them separately, the span of the dome glass panel was reduced, making the structure safer; at the same time, the weight of each hoisting was reduced, lowering the capacity requirements of the hoisting equipment. Attached Figure Description
[0043] Figure 1 This is a flowchart illustrating the installation method of the dome glass curtain wall according to an embodiment of this application.
[0044] Figure 2 This is a schematic diagram of the dome grid structure according to an embodiment of this application.
[0045] Figure 3 This is a partial elevation view of the dome structure according to an embodiment of this application.
[0046] Figure 4 This is a schematic diagram of the dome glass structure according to an embodiment of this application (the dashed lines in the figure represent the annular layers).
[0047] Figure 5 This is a schematic diagram of the installation of the dome curtain wall according to an embodiment of this application.
[0048] Figure 6 This is a schematic diagram of the curtain wall unit structure according to an embodiment of this application.
[0049] Explanation of reference numerals in the attached figures:
[0050] 1. Dome truss; 11. Installation window; 12. Annular layer; 121. Vertical installation opening; 2. Dome glass; 21. Central glass; 22. Annular glass; 221. Annular sash glass; 3. Lifting equipment; 31. Suction cup; 32. Straps; 33. Lifting cable; 4. Curtain wall unit; 41. Glass panel; 42. Connecting frame; 5. Lifting lug. Detailed Implementation
[0051] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0052] This application discloses an installation method for a dome-shaped glass curtain wall.
[0053] Reference Figure 1 The installation method for the dome-structured glass curtain wall includes using hoisting equipment 3 to lift the dome glass 2 from its storage location inside the dome frame 1 to the installation window 11. During transportation, the dome glass 2 is kept vertical, and then it is installed on the dome frame 1. This method shortens the hoisting path, reduces operational difficulty, and eliminates the need for horizontal movement of the dome glass 2 during hoisting, thus simplifying the installation of the glass curtain wall.
[0054] Furthermore, since the dome glass 2 is a flat panel, if it is placed horizontally for transport and hoisting, the direction of gravity will be perpendicular to the panel surface. Under its own weight, the panel surface is prone to bending and deformation, and the deformation will gradually accumulate as the transport and hoisting time increases. Therefore, vertically hoisting the dome glass 2 from indoors and keeping it upright during transport can minimize the risk of deformation and damage.
[0055] Reference Figure 2 A dome-shaped space frame 1 is provided. Eight annular layers 12 are concentrically stacked upwards from the outside to the inside, and adjacent annular layers 12 are connected and fixed to form a dome-shaped space frame 1 with a circular building plan. The dome-shaped space frame 1 is hollow inside and has installation windows 11 at the top. The shape of the installation windows 11 is determined by the annular layers 12 and can be circular or elliptical. The annular layers 12 are made of steel components, and by arranging the annular layers 12 in an alternating manner, vertical installation openings 121 are formed between adjacent annular layers 12. Several vertical installation openings 121 are arrayed along the outer peripheral wall of the annular layers 12.
[0056] Reference Figure 1 , Figure 3The installation of the glass curtain wall consists of two parts: hoisting the dome glass 2 and hoisting the curtain wall units 4. Using hoisting equipment 3, the dome glass 2 is lifted to the installation window 11 and installed at the center of the top of the dome frame 1. The curtain wall units 4 are then lifted to the vertical installation openings 121 and installed on the outer perimeter of the annular layer 12. Each curtain wall unit 4 corresponds to one of the vertical installation openings 121. These two parts are performed independently, without any sequential order. They can be performed sequentially or simultaneously.
[0057] The specific steps for hoisting the dome glass 2 include:
[0058] Provide 2 dome-shaped glass panels.
[0059] Reference Figure 4 The dome glass 2 is a circular glass panel. Since the dome frame 1 is hollow, the weight of the dome glass 2 is supported solely by the connection between its outer perimeter and the dome frame 1. To reduce the span of the dome glass 2 and improve structural safety, it can be divided into nested central glass 21 and annular glass 22 according to the design drawings, and hoisted separately. Considering the cavity in the center of the annular glass 22, multiple lifting points need to be evenly distributed along its circumference to ensure stability during hoisting. Therefore, the annular glass 22 is further divided into four annular panel glass 221. The specific number of annular panels can be adjusted according to the size of the annular glass 22 and construction conditions. Furthermore, dividing the dome glass 2 reduces the load on each hoisting operation and lowers the capacity requirements of the hoisting equipment 3.
[0060] Lifting equipment 3 is provided, which includes a lifting mechanism, a suction cup 31, and a strap 32.
[0061] Reference Figure 5 The hoisting equipment 3 is installed by erecting a scaffold directly above the installation window 11 and fixing the hoisting equipment 3 to the top of the dome frame 1. Since this solution uses a method of hoisting the dome glass 2 from inside the dome frame 1, only vertical lifting is required; horizontal movement of the dome glass 2 is unnecessary. Therefore, the hoisting equipment 3 does not need to have horizontal lifting capabilities. A simpler, more cost-effective hoisting equipment 3 can be installed on top of the dome frame 1. Choosing a hoisting equipment 3 composed of a winch, electric suction cup 31, straps 32, and slings 33 reduces the load requirements and saves costs. Considering the smooth surface of the glass, suction cup 31 is used to adhere and fix the glass panel, eliminating the need for additional lifting rings on the dome glass 2 and simplifying the hoisting process.
[0062] Hoisting the ring-shaped glass 22: Unwind the sling 33 and use the suction cup 31 to hoist the ring-shaped glass 221 from its storage position inside the dome frame 1 to the installation window 11. Hoist the ring-shaped glass 221 in sequence and splice the four sections of the ring-shaped glass 221 end to end to form the ring-shaped glass 22.
[0063] Reference Figure 5 The central glass 21 is then hoisted: the dome glass 2 is attached to the suction cup 31. To improve hoisting safety and prevent the glass from falling, straps 32 can be provided to secure the dome glass 2 to the suction cup 31. The winch is then started to lift the suction cup 31 upwards, hoisting the central glass 21 from its storage position inside the dome frame 1 to the installation window 11. Once the top of the central glass 21 protrudes from the installation window 11, the suction cup 31 is gradually and slowly rotated while the central glass 21 is being lifted upwards. This shortens the hoisting distance and time, improves hoisting efficiency, and makes the dome glass 2 horizontal and positioned above the installation window 11. The central glass 21 is then installed in the center of the annular glass 22, forming the dome glass 2. To ensure smooth hoisting, the central glass 21 can be hoisted above the installation window 11 before the curtain wall support is installed and fixed to the edge of the installation window 11, minimizing interference from the curtain wall support during the hoisting of the central glass 21.
[0064] The specific steps for hoisting curtain wall unit 4 include:
[0065] Reference Figure 6 The system provides a glass panel 41 and a connecting frame 42. The glass panel 41 is fitted and fixed inside the connecting frame 42 to form a curtain wall unit 4. Four lifting lugs 5 are provided. The lifting lugs 5 are fixed at intervals along the circumference of the connecting frame 42 at the top of the connecting frame 42. The lifting lugs 5 are hinged to the connecting frame 42. Then, the slings 33 are passed through each lifting lug 5 and connected to the hoisting equipment 3. The curtain wall unit 4 is hoisted from the outside of the dome grid 1 to the vertical installation opening 121 using the hoisting equipment 3 such as a tower crane or crane. The connecting frame 42 is then connected and fixed to the annular layer 12.
[0066] The glass panel 41 and the connecting frame 42 are assembled into a curtain wall unit 4 and then hoisted and installed as a whole. This eliminates the need for direct connection of the glass panel 41 during on-site construction, thereby shortening on-site construction time and reducing glass damage caused by accidents during on-site operations. During the transportation and stacking of the curtain wall unit 4, the connecting frame 42 can also protect the glass panel 41, thereby preventing damage caused by collisions between the glass panels 41.
[0067] The common connection method between the lifting lug 5 and the hoisted component is welding. The lifting lug 5 is then cut off after the glass curtain wall is installed. Because the lifting lug 5 protrudes outwards, it causes inconvenience in storing the hoisted component during material stacking or transportation. Changing the connection between the lifting lug 5 and the connecting frame 42 to a hinge not only allows for force transmission during hoisting, but also, when the curtain wall unit 4 needs to be stored, rotating the lifting lug 5 so that it fits against the top surface of the connecting frame 42. At this point, the projection of the lifting lug 5 onto the connecting frame 42 is located inside the connecting frame 42, reducing space occupation and making the curtain wall unit 4 easier to store.
[0068] The benefits of the installation method of the dome structure glass curtain wall in this application embodiment are as follows: by providing a dome frame 1 that is concentrically stacked and connected by multiple annular layers 12, a circular installation window 11 is added to the top of the dome frame 1. The installation window 11 is used as a hoisting port, and the dome glass 2 placed inside the dome frame 1 is vertically hoisted to the installation window 11, which shortens the hoisting path and eliminates the process of horizontally moving the dome glass 2 during hoisting. During the hoisting process, the dome glass 2 is kept vertical, and the bending and deformation of the glass panel under the action of gravity is avoided as much as possible.
[0069] By stacking the 12 ring layers upwards and differentiating the curved surface of the dome structure, all curtain wall units 4 are set vertically, eliminating the need to adjust the glass angle according to the curvature of the dome in the original hyperbolic dome structure. This makes the installation of large-span dome structure glass curtain walls simpler and effectively reduces the difficulty of construction.
[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A method for installing a dome-shaped glass curtain wall, characterized in that, Includes the following steps: A dome frame (1) is provided, the dome frame (1) is hollow and has an installation window (11) at the top, and multiple annular layers (12) are provided. The multiple annular layers (12) are arranged concentrically and stacked. The outer peripheral wall of the annular layer (12) has a vertical installation opening (121). Adjacent annular layers (12) are fixedly connected to form the dome frame (1). Installing the glass curtain wall: Provide dome glass (2) and hoisting equipment (3), use the hoisting equipment (3) to hoist the dome glass (2) from the storage position inside the dome frame (1) to the installation window (11), the storage position is located below the installation window (11), keep the dome glass (2) in a vertical state during hoisting, and install the dome glass (2) on the dome frame (1). The steps of installing the glass curtain wall include: Hoisting the annular glass (22): Provide an annular glass (22), and use the hoisting equipment (3) to hoist the annular glass (22) from the storage position inside the dome frame (1) to the installation window (11), and install the annular glass (22) on the dome frame (1); Hoisting the central glass (21): Provide the central glass (21), and use the hoisting equipment (3) to hoist the central glass (21) from the storage position inside the dome frame (1) to the installation window (11), and install the central glass (21) in the middle of the annular glass (22) to form the dome glass (2); A curtain wall unit (4) is provided, and the curtain wall unit (4) is hoisted to the vertical mounting port (121) using the hoisting equipment (3), and the curtain wall unit (4) is installed on the annular layer (12).
2. The installation method of the dome-structure glass curtain wall according to claim 1, characterized in that, The steps for hoisting the ring-shaped glass (22) include: Multiple sections of annular glass (221) are provided. The hoisting equipment (3) is used to hoist the annular glass (221) from the storage position inside the dome frame (1) to the installation window (11). The annular glass (221) is hoisted in sequence, and the multiple sections of annular glass (221) are spliced together end to end to form the annular glass (22).
3. The installation method of the dome-structure glass curtain wall according to claim 1, characterized in that, "Using the hoisting equipment (3) to hoist the dome glass (2) from its storage location inside the dome frame (1) to the installation window (11)" includes: The hoisting equipment (3) includes a lifting mechanism, a suction cup (31), and a strap (32). The dome glass (2) is attached to the suction cup (31), and the dome glass (2) is tied and fixed to the suction cup (31) with the strap (32). The lifting mechanism is activated to lift the suction cup (31) so that the dome glass (2) faces the installation window (11) horizontally downwards, and the dome glass (2) is installed on the dome frame (1).
4. The installation method of the dome-structure glass curtain wall according to claim 3, characterized in that, The step of "lifting the suction cup (31) so that the dome glass (2) faces horizontally downward toward the mounting window (11) and installing the dome glass (2) onto the dome frame (1)" includes: Lift the suction cup (31) upwards. After the top of the dome glass (2) protrudes through the mounting window (11), while lifting the dome glass (2) upwards, gradually rotate the suction cup (31) so that the dome glass (2) becomes horizontal and is located above the mounting window (11).
5. The installation method of the dome-structure glass curtain wall according to claim 1, characterized in that, Before the step of "using the hoisting equipment (3) to hoist the dome glass (2) from its storage position inside the dome frame (1) to the installation window (11)," the method further includes: Erecting hoisting equipment (3): Fix the hoisting equipment (3) on the top of the dome grid (1) so that the hoisting equipment (3) is directly above the installation window (11).
6. The installation method of the dome-structure glass curtain wall according to claim 1, characterized in that, The steps of providing the curtain wall unit (4) include: providing a glass panel (41) and a connecting frame (42), wherein the glass panel (41) is fitted and fixed in the connecting frame (42) to form the curtain wall unit (4); The steps of "using the hoisting equipment (3) to hoist the curtain wall unit (4) to the vertical installation port (121) and install the curtain wall unit (4) on the annular ring layer (12)" include: connecting and fixing the connecting frame (42) to the annular ring layer (12).
7. The installation method of the dome-structure glass curtain wall according to claim 6, characterized in that, Before the step of "using the hoisting equipment (3) to hoist the curtain wall unit (4) to the vertical installation opening (121)," the method further includes: Provide multiple lifting lugs (5), fix the multiple lifting lugs (5) at intervals along the perimeter of the connecting frame (42) to the top of the connecting frame (42), and connect the lifting equipment (3) to the lifting lugs (5).
8. The installation method of the dome-structure glass curtain wall according to claim 7, characterized in that, The step of "fixing the plurality of said lugs (5) at intervals along the perimeter of said connecting frame (42) to the top of said connecting frame (42)" further includes: The lug (5) is hinged to the connecting frame (42). When the lug (5) is rotated to fit against the top surface of the connecting frame (42), the projection of the lug (5) on the connecting frame (42) is located inside the connecting frame (42).
Citation Information
Patent Citations
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CN107558672A
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CN110805189A
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CN207419703U