CN222184052U - An adjustable superimposed turnover type elevator shaft operating platform - Google Patents
An adjustable superimposed turnover type elevator shaft operating platform Download PDFInfo
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- CN222184052U CN222184052U CN202420946277.2U CN202420946277U CN222184052U CN 222184052 U CN222184052 U CN 222184052U CN 202420946277 U CN202420946277 U CN 202420946277U CN 222184052 U CN222184052 U CN 222184052U
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Abstract
本实用新型公开了一种可调节叠加式周转型电梯井操作平台，属于电梯井领域。可调节叠加式周转型电梯井操作平台包括施工平台，施工平台的上方设置有操作架体，操作架体中设置有爬梯，操作架体的顶部设置有操作架体施工平台，操作架体施工平台上开设有上人孔并设置有上人孔盖板；一组操作架体的上方能够叠加若干组操作架体；相邻两组操作架体之间设置有固定装置；施工平台的下方设置有支撑架，支撑架的下方设置有三脚架，三脚架与支撑架的连接处设置有伸缩装置，伸缩装置用于调节支撑架和三脚架的高度以匹配层间高度。上述可调节叠加式周转型电梯井操作平台能够解决现有施工技术层间转换时间耗费较长和组装大量脚手架过程复杂的技术问题。
The utility model discloses an adjustable superimposed turnover type elevator shaft operating platform, which belongs to the field of elevator shafts. The adjustable superimposed turnover type elevator shaft operating platform includes a construction platform, an operating frame is arranged above the construction platform, a ladder is arranged in the operating frame, an operating frame construction platform is arranged on the top of the operating frame, an upper manhole and an upper manhole cover are provided on the operating frame construction platform; a plurality of operating frames can be stacked above a group of operating frames; a fixing device is arranged between two adjacent groups of operating frames; a support frame is arranged below the construction platform, a tripod is arranged below the support frame, and a telescopic device is arranged at the connection between the tripod and the support frame, and the telescopic device is used to adjust the height of the support frame and the tripod to match the inter-layer height. The above-mentioned adjustable superimposed turnover type elevator shaft operating platform can solve the technical problems of the existing construction technology that the inter-layer conversion time is long and the process of assembling a large number of scaffolds is complicated.
Description
Technical Field
The utility model belongs to the field of elevator shafts, and relates to an adjustable stacked turnover elevator shaft operating platform.
Background
Along with the increasing of town speed, the scale and the height of high-rise buildings are continuously expanding, the elevator is taken as an indispensable part in the high-rise buildings, and the construction safety of the elevator shaft is important.
The existing elevator shaft operation platform construction method is mainly divided into an elevator shaft inner groove steel scaffold support system and a shaping elevator shaft operation platform, but a large number of scaffolds are needed to be built in the elevator shaft inner groove steel scaffold support system, the building and dismantling processes are relatively complex, a large amount of time and labor are needed to be consumed, meanwhile, the support system of each layer is needed to be built independently, so that the layer transition time is longer, the layer transition time of the shaping elevator shaft operation platform is shortened, a large number of scaffolds are needed to be built, and customization is needed according to specific elevator shaft sizes and floor heights, so that certain flexibility limitation is caused. If the size of the elevator hoistway or the floor height changes, the operating platform may need to be redesigned and manufactured, thereby increasing construction costs and time.
Disclosure of utility model
In order to overcome the defects of the prior art, the utility model aims to provide an adjustable stacked turnover type elevator shaft operation platform which is used for solving the technical problems that the layer transition time is long and the process of assembling a large number of scaffolds is complex in the prior construction technology.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
The utility model provides an adjustable overlapped turnover type elevator shaft operation platform, which comprises a construction platform, wherein an operation frame body is arranged above the construction platform, a crawling ladder is arranged in the operation frame body, an operation frame body construction platform is arranged at the top of the operation frame body, an upper manhole is arranged on the operation frame body construction platform, and an upper manhole cover plate is arranged on the operation frame body construction platform;
The support frame is arranged below the construction platform, the tripod is arranged below the support frame, a telescopic device is arranged at the joint of the tripod and the support frame, and the telescopic device is used for adjusting the heights of the support frame and the tripod to match the interlayer height.
In the specific implementation process, the width of the cat ladder is half of the width of the operation frame body construction platform.
In the concrete implementation process, the operation frame body comprises a plurality of operation frame body stand columns to form an external frame, and two adjacent groups of operation frame bodies are connected through the operation frame body stand columns and the fixing device in a matched mode.
In the implementation process, the fixing device comprises a connecting component, wherein the two ends of the upright post of the operation frame body are hollow ends, and the hollow ends are matched with the connecting component to be connected with the upright post of the operation frame body.
In the implementation process, a half-length connecting component is inserted into each of the two groups of the upright posts of the operation frame body.
In the concrete implementation process, connecting holes are formed in two ends, close to the upright posts of the operation frame body, through holes are formed in the connecting assembly, and the connecting holes of the upright posts of the operation frame body are aligned with the through holes of the connecting assembly.
In a specific implementation process, the connecting holes are equidistant and equal in size with the through holes.
In a specific implementation process, the fixing device further comprises a gasket and a fixing assembly;
The two groups of gaskets are respectively arranged at two sides of the two groups of operation frame body upright posts, and the openings on the gaskets are aligned with the connecting holes;
the fixing component is arranged on the open hole and the connecting hole in a penetrating mode.
In the specific implementation process, a plurality of equidistant holes with equal size are formed in the connecting end of the tripod and the connecting end of the supporting frame.
In a specific implementation process, the telescopic device comprises a telescopic assembly and a fixed part;
The telescopic component wraps the connecting end of the tripod and the connecting end of the supporting frame, the through holes formed in the telescopic component are aligned with the holes, and the fixing component penetrates through the through holes and is fixed in the holes.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model provides an adjustable stacked turnover type elevator shaft operation platform, which is characterized in that an operation frame body is added to replace a large number of scaffolds, and an upper operation frame body and a lower operation frame body are connected by adopting a fixing device, so that layer transition is realized in different layer heights, the overall stability of the platform is enhanced, and meanwhile, the construction and dismantling processes are simplified. The fixing device enables the construction of the operation frame body to be simpler and more convenient, reduces the use of a large number of scaffolds and complex construction steps, effectively reduces labor and time cost, and improves safety. The heights of the supporting frame and the tripod are controlled through the telescopic device, so that the requirements of heights between different layers are met, the height is only required to be adjusted during installation, the operation frame body is not required to be erected for the second time, and the operation platform can be used after being hoisted.
In conclusion, the utility model solves the problems of incapability of quickly switching the floor height of the elevator shaft, long time consumption for setting up the scaffold, poor safety and the like, can ensure the construction of the elevator shaft to be quick and efficient, ensures the safety and good stability, improves the construction quality of the elevator shaft, shortens the construction time of the elevator shaft and increases the construction safety of the elevator shaft.
Drawings
Fig. 1 is a schematic diagram of an adjustable stacked epicyclic elevator hoistway operating platform of the present utility model;
fig. 2 is a schematic diagram of an adjustable stacked epicyclic elevator hoistway operating platform a of the present utility model;
fig. 3 is a schematic view of an adjustable stacked epicyclic elevator hoistway operating platform B of the present utility model.
Wherein 1-a first tripod upright post; 2-second tripod stand column, 3-first triangle support piece, 4-second triangle support piece, 5-first telescopic component, 6-bolt, 7-second telescopic component, 8-third telescopic component, 9-third triangle support piece, 10-fourth triangle support piece, 11-first support frame stand column, 12-second support frame stand column, 13-construction platform, 14-construction platform main body frame, 15-operation frame stand column, 16-operation frame bottom frame, 17-operation frame middle layer frame, 18-first ladder stand column, 19-second ladder stand column, 20-ladder, 21-upper manhole cover plate, 22-operation frame construction platform, 23-cover plate support device, 24-connection component, 25-gasket and 26-fixed component.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The utility model is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1, the utility model provides an adjustable stacked turnover type elevator shaft operation platform, which mainly comprises a construction platform 13, an operation frame body, a tripod, a support frame, a telescopic device and a fixing device. The telescopic device is used for adjusting the heights of the support frame and the tripod so as to be matched with the interlayer height. Specifically, the operation frame body is arranged above the construction platform 13, the support frame is arranged below the construction platform 13, the fixing device is arranged between two adjacent groups of operation frame bodies, the tripod is arranged below the support frame, and the telescopic device is arranged at the joint of the tripod and the support frame.
The operation frame body is provided with a ladder 20, the width of the ladder 20 is half of the width of the operation frame body construction platform 22, the top of the operation frame body is provided with the operation frame body construction platform 22, and an upper manhole is formed in the operation frame body construction platform 22 and is provided with an upper manhole cover plate 21.
The specific stacked operation frame body is realized by the following devices and parts, the adjustable stacked turnover type elevator shaft operation platform comprises a plurality of groups of operation frame bodies which are stacked, each group of operation frame bodies is internally provided with a crawling ladder 20, each operation frame body comprises a plurality of operation frame body upright posts 15, two adjacent groups of operation frame bodies are connected through the operation frame body upright posts 15 and the fixing devices in a matched mode, each fixing device comprises a connecting assembly 24, two ends of each operation frame body upright post 15 are hollow ends, the hollow ends are matched with the connecting assemblies 24 to connect the operation frame body upright posts 15, and the connecting assemblies 24 with half lengths are respectively inserted into the two groups of operation frame body upright posts 15.
As shown in fig. 3, on the basis of the fixing device, connecting holes are formed at two ends, close to the operation frame body upright posts 15, of the operation frame body upright posts 15, through holes are formed in the connecting assemblies 24, the connecting holes of the operation frame body upright posts 15 are aligned with the through holes of the connecting assemblies 24, the connecting holes are equidistant from the through holes and have the same size, the fixing device further comprises gaskets 25 and fixing assemblies 26, the two groups of gaskets 25 are respectively arranged at two sides of the two groups of operation frame body upright posts 15, the through holes in the gaskets 25 are aligned with the connecting holes, and the fixing assemblies 26 are arranged on the through holes and the connecting holes in a penetrating mode.
Wherein the connection assembly 24 is preferably a small column and the fixing assembly 26 is preferably a fixing bolt.
As shown in fig. 2, the specific height adjustment of the support frame and the tripod is achieved by the following device and component, the telescopic device comprises a telescopic component and a fixing component, a plurality of equidistant holes with equal size are formed in the connecting end of the tripod and the connecting end of the support frame, the telescopic component wraps the connecting end of the tripod and the connecting end of the support frame, through holes formed in the telescopic device are aligned with the holes, and the fixing component penetrates through the through holes and the holes to be fixed.
Wherein the fixing component is preferably a bolt 6, and the telescopic component is preferably a channel steel.
The utility model provides an adjustable overlapped turnover type elevator shaft operation platform which is connected in a three-section connection mode, wherein an adjustable part mainly comprises a tripod, a support frame and a telescopic device, the distance between the tripod and the support frame is adjusted through the telescopic device, the height of a floor is adjusted, the tripod is connected with the support frame through the telescopic device and then fixed, two groups of operation frame bodies are connected through a connecting assembly 24 serving as a bridge, and the two operation frame bodies are matched with a connection method of an operation frame body upright post 15 through the connecting assembly 24, so that the interlayer conversion in different floor heights is realized. Therefore, the operation platform provided by the utility model can shorten the interlayer conversion time, is suitable for different layer heights, and does not need to build an operation frame body for the second time above the operation platform.
In the concrete implementation process, the components are prefabricated and formed, the components can be installed by using a tower crane for hoisting, the installation is simple, the safety of the components is greatly guaranteed, an operation frame body is not required to be built for the second time during construction of a working face, the operation frame body is prefabricated, and the safety is high. In the concrete implementation process, the telescopic device is positioned at the joint of the tripod and the support frame and mainly comprises a first telescopic component 5, a second telescopic component 7 and a third telescopic component 8, the tripod mainly comprises a first tripod stand column 1 and a second tripod stand column 2, the support frame mainly comprises a first support frame stand column 11 and a second support frame stand column 12, the first telescopic component 5 is arranged at the joint of the first tripod stand column 1 and the first support frame stand column 11, the second telescopic component 7 is arranged at the joint of the second tripod stand column 2 and the second support frame stand column 12, and the first telescopic component 5, the second telescopic component 7 and the third telescopic component 8 are provided with fixing components.
In the specific implementation process, a first triangular support piece 3 and a second triangular support piece 4 are respectively arranged on a first tripod upright 1 and a second tripod upright 2 on the tripod.
In a specific implementation process, the support frame comprises a construction platform main body frame 14 consisting of a first support frame upright post 11, a second support frame upright post 12, two inclined struts, three cross beams and four rectangular square tubes, and a third triangular support piece 9 and a fourth triangular support piece 10 are respectively arranged on the first support frame upright post 11 and the second support frame upright post 12. Wherein, first support frame stand 11 and second support frame stand 12, twice bracing, three crossbeams all set up in the below of construction platform main part frame 14, and construction platform main part frame 14 sets up in the below of construction platform 13.
In the concrete implementation process, the operation support body comprises a plurality of operation support body stand 15, an operation support body bottom layer frame 16, an operation support body middle layer frame 17, a cat ladder 20, an upper manhole cover plate 21, an operation support body construction platform 22, a cover plate supporting device 23 and a fixing device, wherein the cat ladder 20 comprises a first cat ladder stand 18 and a second cat ladder stand 19, the cat ladder 20 is positioned in the operation support body, the fixing device is positioned between two adjacent operation support bodies, the operation support body construction platform 22 is positioned at the top of the operation support body, an upper manhole is formed in the operation support body construction platform 22 and is provided with the upper manhole cover plate 21, the cover plate supporting device 23 is arranged below the upper manhole cover plate 21, the outer frame is formed by the plurality of operation support body stand 15, and the operation support body bottom layer frame 16 and the operation support body middle layer frame 17 are arranged on the plurality of operation support body stand 15.
The construction process of the adjustable stacked turnover type elevator shaft operation platform structure provided by the utility model comprises the following steps:
The method comprises the steps of installing a telescopic device, connecting the tail part of a wrapping support frame in a larger first telescopic component with the head part of a tripod according to a three-section connection method, adjusting the distance between the tripod and the support frame to achieve the purpose of layer transition, and finally fixing by using a fixing part to ensure that the telescopic device is stable and reliable;
Step two, the operation frame body is positioned above the construction platform 13, the crawling ladder 20 is positioned in the operation frame body, the crawling ladder 20 occupies half of the operation frame body so as to achieve the mutual stagger of the two operation frame bodies, the upper manhole cover plate 21 is placed above the crawling ladder 20, and after people pass, the upper manhole cover plate 21 is covered to ensure the safety of the people. Half of the connecting components 24 are inserted into the head of the first operation frame body, the other half of the connecting components are inserted into the tail of the second operation frame body, the two operation frame bodies are connected, gaskets 25 are placed on two sides of each connecting component, and the two operation frame bodies are fixed by using the fixing components 26, so that firm and stable installation of the operation frame bodies is ensured.
The components are all customized, the height is only required to be adjusted during installation, the operation frame body is not required to be erected for the second time, and the operation frame body can be used by being hoisted to the operation frame body construction platform 22. The operation frame body construction platform 22 is subjected to bearing capacity test, so that the operation frame body is prefabricated in advance, and the construction safety is ensured.
Example 1
The adjustable stacked turnover type elevator shaft operation platform comprises a construction platform 13, an operation frame body, a tripod, a support frame, a telescopic device and a fixing device, wherein the fixing device comprises a connecting assembly 24, a gasket 25 and a fixing assembly 26, the connecting assembly 24 is a small upright post, the fixing assembly 26 is a fixing bolt, the telescopic device comprises a telescopic assembly and a fixing part, the fixing part is a bolt 6, the telescopic assembly is a channel steel, and the operation frame body mainly comprises an operation frame body upright post 15.
The telescoping device sets up the junction at tripod and support frame, and fixing device sets up between two adjacent groups of operation support body, and the operation support body sets up the top at construction platform 13, and the support frame sets up the below at construction platform 13, and the tripod sets up the below at the support frame, and the telescoping device sets up the junction at tripod and support frame. The operation frame body is internally provided with a crawling ladder 20, the top of the operation frame body is provided with an operation frame body construction platform 22, and an upper manhole is arranged on the operation frame body construction platform 22 and is provided with an upper manhole cover plate 21.
The two channel steels are arranged at the joint of the tripod and the supporting frame, the tripod is adjusted to be high through the channel steels, the small stand columns are connected with the stand columns 15 of the operation frame bodies in the two operation frame bodies, and the gaskets 25 are arranged at the outer sides of the small stand columns and are connected and fixed through fixing bolts.
Example 2
The adjustable stacked turnover type elevator shaft operation platform comprises a construction platform 13, an operation frame body, a tripod, a support frame, a telescopic device and a fixing device, wherein the fixing device comprises a connecting assembly 24, a gasket 25 and a fixing assembly 26, the connecting assembly 24 is a small upright post, the fixing assembly 26 is a fixing bolt, the telescopic device comprises a telescopic assembly and a fixing part, the fixing part is a bolt 6, the telescopic assembly is a channel steel, and the operation frame body mainly comprises an operation frame body upright post 15.
The telescoping device sets up the junction at tripod and support frame, and fixing device sets up between two adjacent groups of operation support body, and the operation support body sets up the top at construction platform 13, and the support frame sets up the below at construction platform 13, and the tripod sets up the below at the support frame, and the telescoping device sets up the junction at tripod and support frame. The operation frame body is internally provided with a crawling ladder 20, the top of the operation frame body is provided with an operation frame body construction platform 22, and an upper manhole is arranged on the operation frame body construction platform 22 and is provided with an upper manhole cover plate 21.
The two channel steels are arranged at the joint of the tripod and the supporting frame, the tripod is adjusted to be high through the channel steels, the small stand columns are connected with the stand columns 15 of the operation frame bodies in the two operation frame bodies, and the gaskets 25 are arranged at the outer sides of the small stand columns and are connected and fixed through fixing bolts.
The two ends of the operation frame body upright post 15 are hollow ends, the hollow ends are matched with small upright posts to connect the operation frame body upright post 15, and small upright posts with half length are respectively inserted into the two groups of operation frame body upright posts.
Connecting holes are formed in two ends, close to the operation frame body upright posts 15, of the small upright posts, through holes are formed in the small upright posts, the connecting holes of the operation frame body upright posts 15 are aligned with the through holes of the small upright posts, the connecting holes are equidistant and equal in size with the through holes, two groups of gaskets 25 are respectively arranged on two sides of the two groups of operation frame body upright posts 15, the holes in the gaskets 25 are aligned with the connecting holes, and fixing bolts penetrate through the holes and the connecting holes.
A plurality of equidistant holes with equal size are formed in the connecting end of the tripod and the connecting end of the supporting frame, the connecting end of the tripod and the connecting end of the supporting frame are wrapped by channel steel, through holes formed in the channel steel are aligned with the holes, and bolts 6 penetrate through the through holes and the holes to be fixed.
The components are all customized, the height of the components is adjusted only through channel steel during installation, the operation frame body is not required to be erected for the second time, and the operation frame body can be used by being lifted to an operation platform. The adjustable stack formula turnover formula elevator shaft operation platform that this embodiment provided is applicable to the more floors of change layer, and the operation support body need not to be set up at the operation layer construction for the second time.
The above is only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the claims of the present utility model.
Claims (10)
1. The adjustable stacked turnover type elevator shaft operation platform is characterized by comprising a construction platform (13), wherein an operation frame body is arranged above the construction platform (13), a crawling ladder (20) is arranged in the operation frame body, an operation frame body construction platform (22) is arranged at the top of the operation frame body, an upper manhole is arranged on the operation frame body construction platform (22) and is provided with an upper manhole cover plate (21), a plurality of groups of operation frame bodies can be stacked above one group of operation frame bodies, and a fixing device is arranged between two adjacent groups of operation frame bodies;
The support frame is arranged below the construction platform (13), the tripod is arranged below the support frame, a telescopic device is arranged at the joint of the tripod and the support frame, and the telescopic device is used for adjusting the heights of the support frame and the tripod to match the interlayer height.
2. The adjustable stacked epicyclic elevator hoistway operating platform according to claim 1, wherein the width of said ladder stand (20) is half the width of the operating frame body construction platform (22).
3. The adjustable stacked circulating elevator hoistway operating platform of claim 1, wherein the operating frame body is an external frame formed by a plurality of operating frame body columns (15), and two adjacent groups of operating frame bodies are cooperatively connected with a fixing device through the operating frame body columns (15).
4. The adjustable stacked circulating elevator hoistway operating platform of claim 3, wherein the fixing device comprises a connecting assembly (24), two ends of the operating frame body upright (15) are hollow ends, and the hollow ends are matched with the connecting assembly (24) to be connected with the operating frame body upright (15).
5. The adjustable stacked, turnaround elevator hoistway operating platform of claim 4, wherein a half length connection assembly (24) is inserted into each of the two sets of operating frame body posts (15).
6. The adjustable stacked turnaround elevator hoistway operating platform of claim 4, wherein connecting holes are formed near both ends of the handling frame body column (15), perforations are formed in the connecting members (24), and the connecting holes of the handling frame body column (15) are aligned with the perforations of the connecting members (24).
7. The adjustable stacked, turnaround elevator hoistway operating platform of claim 6, wherein the connection holes are equidistant and equal in size from the perforations.
8. The adjustable stacked epicyclic elevator hoistway operating platform according to claim 6, wherein said securing means further comprises a spacer (25) and a securing assembly (26);
The two groups of gaskets (25) are respectively arranged at two sides of the two groups of operation frame body upright posts (15), and the openings on the gaskets (25) are aligned with the connecting holes;
The fixing component (26) is arranged on the open hole and the connecting hole in a penetrating mode.
9. The adjustable stacked circulating elevator hoistway operating platform of claim 1, wherein a plurality of equidistant holes are formed in the connecting end of the tripod and the connecting end of the supporting frame.
10. The adjustable stacked, epicyclic elevator hoistway operating platform according to claim 9, wherein said telescoping device comprises a telescoping assembly and a fixed component;
The telescopic component wraps the connecting end of the tripod and the connecting end of the supporting frame, the through holes formed in the telescopic component are aligned with the holes, and the fixing component penetrates through the through holes and is fixed in the holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420946277.2U CN222184052U (en) | 2024-04-30 | 2024-04-30 | An adjustable superimposed turnover type elevator shaft operating platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420946277.2U CN222184052U (en) | 2024-04-30 | 2024-04-30 | An adjustable superimposed turnover type elevator shaft operating platform |
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| Publication Number | Publication Date |
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| CN222184052U true CN222184052U (en) | 2024-12-17 |
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|---|---|---|---|
| CN202420946277.2U Active CN222184052U (en) | 2024-04-30 | 2024-04-30 | An adjustable superimposed turnover type elevator shaft operating platform |
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| CN (1) | CN222184052U (en) |
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Effective date of registration: 20251028 Address after: No. 1, Binshan Avenue, Fuping County, Weinan City, Shaanxi Province, 711700 Patentee after: Shaanxi Construction Engineering Huaxin Dingye Engineering Equipment Co.,Ltd. Country or region after: China Address before: 710032 No. 242 middle Changle Road, Xincheng District, Shaanxi, Xi'an Patentee before: SCEGC NO.5 CONSTRUCTION ENGINEERING GROUP Co.,Ltd. Country or region before: China |