CN109610763B - Composite wall body of building outer wall and construction method thereof - Google Patents
Composite wall body of building outer wall and construction method thereof Download PDFInfo
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- CN109610763B CN109610763B CN201811594599.0A CN201811594599A CN109610763B CN 109610763 B CN109610763 B CN 109610763B CN 201811594599 A CN201811594599 A CN 201811594599A CN 109610763 B CN109610763 B CN 109610763B
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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
- E04F13/0875—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 having a basic insulating layer and at least one covering layer
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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
- E04F13/0803—Separate fastening elements with load-supporting elongated furring elements between wall and covering elements
- E04F13/081—Separate fastening elements with load-supporting elongated furring elements between wall and covering elements with additional fastening elements between furring elements and covering elements
- E04F13/0816—Separate fastening elements with load-supporting elongated furring elements between wall and covering elements with additional fastening elements between furring elements and covering elements the additional fastening elements extending into the back side of the covering elements
- E04F13/0819—Separate fastening elements with load-supporting elongated furring elements between wall and covering elements with additional fastening elements between furring elements and covering elements the additional fastening elements extending into the back side of the covering elements inserted into grooves in the back side of the covering elements
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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
- E04F13/0866—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 composed of several layers, e.g. sandwich panels or layered panels
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Finishing Walls (AREA)
- Building Environments (AREA)
Abstract
The invention relates to a composite wall of a building outer wall and a construction method thereof, wherein the composite wall comprises an outer hanging plate used as the outer side surface of the wall and an inner side plate used as the inner side surface of the wall, the outer hanging plate is fixed on a keel through a hanging piece, the inner side plate is fixed on an upright post, a heat insulation layer is filled between the outer hanging plate and the inner side plate, the keel and the upright post are arranged in the heat insulation layer, and the distance between the outer hanging plate and the keel is adjustable. The invention has the effect of convenient construction.
Description
Technical Field
The invention relates to the technical field of building components, in particular to a composite wall of an outer wall of a building and a construction method thereof.
Background
Building energy conservation is a worldwide trend, and the energy conservation of the enclosure structure is important for building energy conservation. The exterior wall has the key points that the heat transfer and the heat consumption of the exterior wall account for 33-34% of the total heat consumption of the building, and the energy conservation of the exterior wall accounts for a non-negligible position in the energy conservation of the building. The material has improved properties of heat preservation, durability, mechanics, fire prevention and the like, realizes synchronous design and synchronous construction of wall heat preservation and building structure, ensures that the wall heat preservation and the building structure have safe and reliable quality, good heat preservation and fire prevention properties and the same service life of heat preservation and energy saving as buildings, is a great change to the traditional building design and construction method, is an effective way for breaking the potential safety hazard of the quality of the building heat preservation engineering, is also an energy-saving development target adapting to the national building, improves the innovation level of the building energy-saving technology, and realizes the sustainable development idea of green buildings.
At present, building energy conservation is only limited to smearing thermal insulation mortar on the surface of an outer wall and pasting and hanging thermal insulation boards, although the outer thermal insulation technology has more advantages than the inner thermal insulation technology and the sandwich thermal insulation technology, the quality field operation of the outer thermal insulation has uncontrollable property, and quality defects such as hollowing and dropping are easily caused, even fire disasters are caused; in the aspect of exterior wall decoration, dry-hanging stone technology is mostly adopted at present, but the defects of easy cracking, deformation, whitening, discoloration, falling off, poor heat insulation and heat preservation performance and the like are caused.
Disclosure of Invention
The invention aims to provide a composite wall body of an outer wall of a building and a construction method thereof, and the composite wall body has the advantage of convenience in construction.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a composite wall of building outer wall, includes the cladding panel as the wall body lateral surface and the interior plate as the wall body medial surface, the cladding panel passes through the bridging piece to be fixed on fossil fragments, the interior plate is fixed on the stand, it has the heat preservation to fill between cladding panel and the interior plate, fossil fragments and stand setting are in the heat preservation, the interval of cladding panel and fossil fragments is adjustable.
By adopting the technical scheme, the external hanging plate and the internal side plate are directly used as the pouring templates, the construction is rapid, the templates do not need to be arranged, the cost is reduced, and meanwhile, the heat insulation effect can be further improved by adopting the filled heat insulation layer.
The invention is further configured to: the hanging piece comprises a fixed screw cylinder fixed on the keel, an adjusting screw rod is coaxially and threadedly connected in the fixed screw cylinder, and a hanging locking block is fixedly connected at one end of the adjusting screw rod, which is far away from the inner side plate;
the hanging groove that articulates that the locking piece articulates is provided with to supply to articulate to the link plate inboard, the link plate bottom link up the link plate bottom, it falls the piece of making an uproar to articulate the barb type that sets up a plurality of upslopes in the groove to articulate.
Through adopting above-mentioned technical scheme, the setting that the piece was fallen in the barb type is used for improving the function of making an uproar that falls of cladding to articulate the locking piece by supreme one-way sliding down and articulate the inslot, fall the piece of making an uproar and can also play the effect that the auxiliary stay articulated the locking piece, improve the stability that articulates the locking piece position.
The invention is further configured to: articulate the locking piece and articulate two lateral walls of the mutual butt of groove and be provided with the spring fixture block respectively, articulate the inslot lateral wall and be provided with the constant head tank with the spring fixture block joint, the inboard fixedly connected with stay cord of spring fixture block, the stay cord is worn out and is articulated the locking piece and outwards extend.
Through adopting above-mentioned technical scheme, the setting of spring fixture block and constant head tank is used for improving and articulates the locking piece and articulate the stability of being connected between the groove, and the setting of stay cord is used for realizing returning of spring fixture block simultaneously and contracts, and then the spring fixture block of being convenient for breaks away from with the constant head tank, realizes the dismantlement of cladding.
The invention is further configured to: the exterior cladding panel is formed by the polylith concatenation, slides between two adjacent exterior cladding panels and connects.
Through adopting above-mentioned technical scheme, improved the firm connection of adjacent cladding.
The invention is further configured to: the outer side of the cladding panel is provided with a printing layer and a transparent layer, and the transparent layer covers the outer surface of the printing layer.
By adopting the technical scheme, the appearance of the exterior cladding panel is improved, the possibility that the traditional coating layer falls off is reduced, and the service life of the exterior cladding panel is prolonged.
The invention is further configured to: the heat-insulating layer is formed by foam concrete, and the foam concrete is poured between the inner side plate and the outer hanging plate.
By adopting the technical scheme, the cast-in-place foam concrete has convenient construction and good heat preservation.
The invention is further configured to: the inner side plate is composed of a fiber plate, a plurality of filling grooves are formed in the inner wall of the fiber plate, and negative oxygen ion releasing agents are arranged in the filling grooves.
By adopting the technical scheme, the negative oxygen ions released by the negative oxygen ion releasing agent are distributed indoors, so that the negative oxygen ion releasing agent is beneficial to degrading harmful gases in the air, and has the effect of improving the living environment of people.
Based on the same inventive concept, the invention also provides a construction method of the composite wall of the building outer wall, which comprises the following steps:
s1, removing the outer frame of the main building structure and installing a construction hanging basket;
s2, drilling mounting holes on the main structure of the building to install anchoring nails;
s3, installing keels, wherein the keels comprise vertical keels and transverse keels; wherein, a vertical keel is arranged at the position without an anchoring stress point, the vertical keel is fixed on the main body beam, and then a transverse keel is fixedly arranged on the vertical keel;
s4, mounting a bracket for assisting in bearing the weight of the insulating layer on the main structure of the building;
s5, implanting steel bars at the interface of the main structure of the building and the outer filler wall, and mounting reinforcing ribs around the window;
s6, mounting the upright posts, the outer hanging plates and the inner side plates;
and S7, forming a cavity, and filling a heat insulation layer in the cavity between the inner surface of the cladding, the inner side surface of the inner side plate and the outer surface of the main structure of the building.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the foam concrete has good heat insulation performance, contains a large number of closed fine pores, can effectively obstruct energy exchange inside and outside a room, has good thermal performance, adopts different wall thicknesses when the density of the foam concrete is less than 700kg/m3, can realize self heat insulation on the outer wall, and meets the national requirement of saving energy by 65%;
2. the sound insulation performance is good, and the sound absorption and insulation functions of the external hanging plate are improved by arranging the noise reduction sheets;
3. the hanging locking block is adopted, and the effect of stable connection of the outer hanging plate can be achieved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic cross-sectional view a-a of fig. 1.
Fig. 3 is a schematic diagram for embodying the structure of the hanging groove in the present invention.
Fig. 4 is a schematic sectional view B-B of fig. 3.
In the figure, 1, an external hanging plate; 11. a hanging groove; 12. a noise reduction sheet; 13. positioning a groove; 14. printing layer; 15. a transparent layer; 2. an inner side plate; 21. filling the groove; 3. hanging and connecting pieces; 32. fixing the screw cylinder; 33. adjusting the screw rod; 34. hanging a locking block; 35. a spring clamping block; 36. pulling a rope; 37. locking the screw; 4. a keel; 41. a vertical keel; 42. a transverse keel; 5. a column; 6. and (7) an insulating layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the composite wall of the building exterior wall disclosed by the invention comprises inner side plates 2 and outer hanging plates 1 on two sides of the wall, wherein the inner side plates 2 are specifically autoclaved asbestos-free cellulose fiber cement plates, the outer hanging plates 1 are stone plates, porcelain plates, ceramic plates and the like which can be back-bolted, perforated and fixed, and an insulating layer 6 is filled between the outer hanging plates 1 and the inner side plates 2. The insulating layer 6 is made of light foam concrete. C-shaped light steel upright posts 5, square steel vertical keels 41 and L-shaped angle steel transverse keels 42 are distributed between the inner side plate 2 and the outer hanging plate 1, the square steel vertical keels 41 and the L-shaped angle steel transverse keels 42 form keels 4, and the keels 4 and the upright posts 5 are arranged in the heat insulation layer 6. The inner side plate 2 is anchored on the C-shaped light steel upright post 5 through an anchoring nail; the L-shaped angle steel cross keel 42 is connected with the square steel vertical keel 41 through an anchoring nail; the exterior cladding panel 1 links to each other with L angle steel cross keel 42 through hanging the union piece 3, and the fine setting can be realized to the interval of exterior cladding panel 1 and fossil fragments 4. At the main structure part of the building, the exterior cladding panel 1 is connected with the main structure anchoring connecting piece through a hanging piece 3; and light foam concrete is poured into a cavity naturally formed among the external hanging plate 1, the internal side plate 2 and the external surface of the main building structure to form the heat-insulation and decoration integrated composite external wall.
The distance between the exterior cladding 1 and the building main body can be adjusted by the hanging piece 3, the larger the distance is, the thicker the wrapping layer of the foam concrete (the outer surface of the building main body beam, column and shear wall) is, and the better the heat preservation effect is. The heat conductivity coefficient of the foam concrete with the dry density of 600kg/m3 is 0.14w/(m.k), the thermal resistance of a coating layer with the thickness of 120mm is equivalent to that of an XPS plate with the thickness of 30mm, and the energy-saving requirement of the building in the hot summer and the cold winter areas of China can be basically met. The thermal insulation performance of the filling wall part is better, if the distance between the outer wall decorative plate and the building main body is 120mm, the thickness of the foam concrete of the filling wall part can reach 312mm, and more than enough self-insulation is realized. In cold regions with higher heat-insulating requirements, XPS plates (namely decorative heat-insulating composite plates) with the thickness of several centimeters can be adhered to the back of the outer wall decorative plate and poured together with the foam concrete after installation, so that the heat-insulating performance can be enhanced, the building energy-saving requirements in the cold regions can be met, the distance between the decorative plate and the main body can be shortened, the thickness of the composite wall body can be reduced, the pouring amount of the foam concrete can be reduced, and the cost can be saved.
Referring to fig. 1, the exterior cladding panel 1 is formed by splicing a plurality of exterior cladding panels 1, and the adjacent exterior cladding panels 1 are connected in a sliding manner. The outer side of the cladding board 1 is provided with a printing layer 14 and a transparent layer 15, and the transparent layer 15 covers the outer surface of the printing layer 14.
Referring to fig. 1, the inner wall of the fiberboard is provided with a plurality of filling grooves 21, and the filling grooves 21 are provided with a negative oxygen ion releasing agent. The negative oxygen ion releasing agent releases negative oxygen ions distributed indoors, is beneficial to degrading harmful gases in the air and has the effect of improving the living environment of people.
Referring to fig. 3 and 4, the hanging piece 3 comprises a fixed screw cylinder 32 fixed on the keel, an adjusting screw 33 is coaxially and threadedly connected in the fixed screw cylinder 32, and a hanging locking block 34 is fixedly connected at one end of the adjusting screw 33 far away from the inner side plate 2; the inboard of cladding panel 1 is provided with the groove 11 that articulates that supplies to articulate locking piece 34, articulates the bottom of groove 11 and link up cladding panel 1 bottom, articulates and sets up the barb type of a plurality of tilt up and fall the piece 12 of making an uproar in the groove 11. The setting of the barb type noise reduction piece 12 is used for improving the noise reduction function of the external hanging plate 1, and the hanging lock block 34 slides in the hanging groove 11 from bottom to top in a one-way mode, and the noise reduction piece 12 can also play a role in assisting in supporting the hanging lock block 34, so that the stability of the position of the hanging lock block 34 is improved. The specific board of making an uproar of falling can have the fix with screw to hang the shell fragment that connects 11 lateral walls of groove and constitute, and the equipartition has a plurality of sound holes of inhaling on the shell fragment to shell fragment limit, surface coating have the sound absorbing coating. Noise is propagated and takes place the reflection in articulate groove 11, and acoustic energy reduces, realizes the noise reduction effect, and the setting of shell fragment has prolonged the reflection route of sound wave, has reduced the decay rate of sound wave as early as possible.
Referring to fig. 4, two side walls of the hooking locking block 34 and the hooking groove 11, which are abutted against each other, are respectively provided with a spring clamping block 35, the inner side wall of the hooking groove 11 is provided with a positioning groove 13 clamped with the spring clamping block 35, the inner side of the spring clamping block 35 is fixedly connected with a pulling rope 36, the pulling rope 36 penetrates through the hooking locking block 34 and extends outwards, and the side wall of the cladding panel 1 is provided with a locking screw 37 (see fig. 3) which is fixedly connected with one end of the pulling rope 36, which is. The arrangement of the spring clamping block 35 and the positioning groove 13 is used for improving the stability of connection between the hanging locking block 34 and the hanging groove 11, and meanwhile, the arrangement of the pull rope 36 is used for realizing retraction of the spring clamping block 35, so that the spring clamping block 35 is conveniently separated from the positioning groove 13, and the outer hanging plate 1 is disassembled, so that the outer hanging plate 1 can be easily disassembled and reassembled in the installation dislocation or maintenance process.
The construction method of the embodiment comprises the following steps: s1, removing the outer frame of the main building structure and installing a construction hanging basket; s2, drilling mounting holes on the main structure of the building to install anchoring nails; s3, installing keels, wherein the keels comprise vertical keels 41 and transverse keels 42; wherein, a vertical keel 41 is arranged at the position without an anchoring stress point, the vertical keel 41 is fixed on the main body beam, and then a transverse keel 42 is fixedly arranged on the vertical keel 41; s4, mounting a bracket for assisting in bearing the weight of the heat-insulating layer 6 on the main structure of the building; s5, implanting steel bars at the interface of the main structure of the building and the outer filler wall, and mounting reinforcing ribs around the window; s6, mounting upright posts 5, an exterior cladding panel 1 and an interior side panel 2; and S7, forming a cavity between the inner surface of the exterior cladding 1, the inner side surface of the inner side plate 2 and the outer surface of the main structure of the building, filling the cavity with a heat-insulating layer 6 in a layered mode, and pouring light foam concrete into the cavity.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. A composite wall of a building outer wall is characterized in that: the thermal insulation wall comprises an exterior plate (1) serving as the outer side face of the wall body and an interior plate (2) serving as the inner side face of the wall body, wherein the exterior plate (1) is fixed on a keel through a hanging piece (3), the interior plate (2) is fixed on an upright post (5), a thermal insulation layer (6) is filled between the exterior plate (1) and the interior plate (2), the keel and the upright post (5) are arranged in the thermal insulation layer (6), and the distance between the exterior plate (1) and the keel is adjustable; the hanging connecting piece (3) comprises a fixed screw cylinder (32) fixed on the keel, an adjusting screw rod (33) is coaxially and threadedly connected in the fixed screw cylinder (32), and a hanging locking block (34) is fixedly connected at one end, far away from the inner side plate (2), of the adjusting screw rod (33); a hanging groove (11) for hanging a hanging locking block (34) is formed in the inner side of the outer hanging plate (1), the bottom of the hanging groove (11) penetrates through the bottom of the outer hanging plate (1), and a plurality of barb type noise reduction sheets (12) inclining upwards are arranged in the hanging groove (11); the noise reduction sheet (12) is composed of an elastic sheet fixed on the side wall of the hanging groove (11) through screws, sound absorption holes are uniformly distributed on the elastic sheet, and sound absorption paint is coated on the surface of the elastic sheet; articulate locking piece (34) and articulate two lateral walls of the mutual butt in groove (11) and be provided with spring fixture block (35) respectively, articulate groove (11) inside wall and be provided with constant head tank (13) with spring fixture block (35) joint, spring fixture block (35) inboard fixedly connected with stay cord (36), stay cord (36) are worn out and are articulated locking piece (34) and outwards extend.
2. The composite wall for an exterior wall of a building of claim 1, wherein: the outer hanging plates (1) are formed by splicing a plurality of blocks, and the adjacent two outer hanging plates (1) are connected in a sliding manner.
3. The composite wall for an exterior wall of a building of claim 2, wherein: the outer side of the outer hanging plate (1) is provided with a printing layer (14) and a transparent layer (15), and the transparent layer (15) covers the outer surface of the printing layer (14).
4. The composite wall for an exterior wall of a building of claim 1, wherein: the heat-insulating layer (6) is made of foam concrete, and the foam concrete is poured between the inner side plate (2) and the outer hanging plate (1).
5. The composite wall for an exterior wall of a building of claim 1, wherein: the inner side plate (2) is composed of a fiber plate, a plurality of filling grooves (21) are formed in the inner wall of the fiber plate, and negative oxygen ion releasing agents are arranged in the filling grooves (21).
6. The method for constructing a composite wall for an exterior wall of a building as claimed in any one of claims 1 to 5, comprising the steps of:
s1, removing the outer frame of the main building structure and installing a construction hanging basket;
s2, drilling mounting holes on the main structure of the building to install anchoring nails;
s3, installing keels (4), wherein each keel comprises a vertical keel (41) and a transverse keel (42); wherein, a vertical keel (41) is arranged at the position without an anchoring stress point, the vertical keel (41) is fixed on the main body beam, and then a transverse keel (42) is fixedly arranged on the vertical keel (41);
s4, mounting a bracket for assisting in bearing the weight of the heat-insulating layer (6) on the main structure of the building;
s5, implanting steel bars at the interface of the main structure of the building and the outer filler wall, and mounting reinforcing ribs around the window;
s6, mounting columns (5), an outer hanging plate (1) and an inner side plate (2);
s7, forming a cavity inner layered filling heat preservation layer (6) among the inner surface of the external cladding (1), the inner side surface of the inner side plate (2) and the outer surface of the main structure of the building.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811594599.0A CN109610763B (en) | 2018-12-25 | 2018-12-25 | Composite wall body of building outer wall and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811594599.0A CN109610763B (en) | 2018-12-25 | 2018-12-25 | Composite wall body of building outer wall and construction method thereof |
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| CN109610763A CN109610763A (en) | 2019-04-12 |
| CN109610763B true CN109610763B (en) | 2020-12-01 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344523A (en) * | 2019-07-20 | 2019-10-18 | 阜阳市金亮涂料有限公司 | The exterior trim part installation part of external insulation building |
| CN113530128B (en) * | 2021-07-23 | 2022-07-15 | 深圳和海枫建设科技有限公司 | Fixed fastener structure of decorative board installation |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT219412Z2 (en) * | 1990-03-16 | 1993-02-26 | DEVICE FOR FASTENING DECORATIVE PANELS ON WALL OR ON METAL FRAME FOR THE CONSTITUTION OF VENTILATED ORNAMENTAL FACADES | |
| CN202767293U (en) * | 2012-07-12 | 2013-03-06 | 泰安市当代建筑设计咨询有限公司 | Cast-in-place foam concrete external wall free of form removal |
| CN205259531U (en) * | 2016-01-04 | 2016-05-25 | 北京中建乐孚装饰工程有限责任公司 | Exempt from basic level treatment vitrified tile , sheet metal stone cladding process structure |
| CN205369794U (en) * | 2016-02-01 | 2016-07-06 | 中国装饰股份有限公司 | Artificial agglomerated stone mounting bracket |
| CN105888099A (en) * | 2016-06-03 | 2016-08-24 | 湖南省建筑工程集团总公司 | Heat preservation and decoration integrated composite wall serving as building outer wall and construction method of integrated composite wall |
| CN107938969A (en) * | 2017-11-17 | 2018-04-20 | 成都鑫富汇纸业有限公司 | A kind of noise isolates ornament materials |
| CN207794510U (en) * | 2018-01-27 | 2018-08-31 | 深圳中海世纪建筑设计有限公司 | A kind of solar-energy wall mounting structure for building |
| CN108396931B (en) * | 2018-02-07 | 2020-07-28 | 深圳市晶宫设计装饰工程有限公司 | Dry hanging device for building wall tile |
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2018
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Address after: 212000 No. 699, Nanxu Avenue, Zhenjiang City, Jiangsu Province Patentee after: Zhenjiang Planning Survey and Design Group Co.,Ltd. Address before: 212004 No. 699 Nanxu Avenue, Zhenjiang City, Jiangsu Province Patentee before: ZHENJIANG PLANNING AND DESIGN INSTITUTE |
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