CN1244744C - External wall slab for building and its productive technology and apparatus - Google Patents
External wall slab for building and its productive technology and apparatus Download PDFInfo
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- CN1244744C CN1244744C CN 01123380 CN01123380A CN1244744C CN 1244744 C CN1244744 C CN 1244744C CN 01123380 CN01123380 CN 01123380 CN 01123380 A CN01123380 A CN 01123380A CN 1244744 C CN1244744 C CN 1244744C
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Abstract
The present invention relates to a new house outer wall plate, wherein the outer wall plate is composed of a core material and surface layers, wherein the core material (1) is clamped between the surface layers (2), one end of the core material (1) protrudes from the side surface of the wall plate, the other end of the core material (1) is recessed in the wall plate, and the protruding part and the recessing part of the core material (1) are formed into a fitting pair. A notch is processed in the connecting seam of the outer wall plate and the other wall plate. The present invention relates to a production process for producing the outer wall plate, and a production device for carrying out the production process.
Description
Technical field
The present invention relates to a kind of constructional materials, more specifically to a kind of light thermal-insulation external wall slab for building, the production equipment that also relates to corresponding mould, is used to produce the technology of this side fascia and is used to implement this production technology, and the house and the wall construction that build up with this side fascia.
Background technology
Along with world energy sources crisis and increasing the weight of of oil supply anxiety in recent years, energy-conservationly more and more be subject to people's attention with environmental protection.In recent years, country advocates use New Building Materials, particularly wall board material energetically, and advanced countries such as Europe and North America have adopted different heat-preserving equipments to solve the indoor/outdoor temperature-difference problem, warming plate (benzene plate or glass wool) for example, insulated wall or thermal insulation exterior wall urushoil etc.But the major defect of existing side fascia is that the longitudinal seam between the side fascia makes the wallboard generation expand with heat and contract with cold through the cold and hot variation in the four seasons, cause the longitudinal seam cracking between the side fascia, problems such as seeping water or leaks out are more arranged, cause the side fascia heat insulating ability to reduce, and influence attractive in appearance.
In addition, side fascia adopts simple mould always, with manpower, manual serve as mainly to produce or locally use machinery and whole production flow process on-mechanicalization, make product quality lower, size is accurate inadequately, and shape can not be unified, production efficiency is low, thereby influences the popularization and the use of side fascia.The inner wall panel production equipment is arranged at present both at home and abroad, and as the vertical inner wall panel machine of Henan Ma Na company, the inner wall panel machine that Italy produces etc., and side fascia production mechanization equipment is not found so far both at home and abroad.
Summary of the invention
The purpose of this invention is to provide a kind of novel external wall plate, it can effectively prevent longitudinal seam cracking between the side fascia installation rear wall plate, and technology of producing this novel external wall plate and the production equipment that is used to implement this production technology also are provided.In addition, the present invention's mould of also having advised being used for the seam method between the light thermal-insulation side fascia that the present invention proposes and having made the light thermal-insulation side fascia that the present invention proposes.
First purpose of the present invention is achieved in that to be that side fascia is made up of core and top layer, and wherein core is clipped between the top layer, and the core two sides process two special types cooperations and pay, and pays as concavo-convex cooperation, and two blocks of side fascias are paid by this cooperation and combined.Core is compressible, and therefore when side fascia expanded with heat and contract with cold, the distortion of core had remedied the craze and transfiguration amount of side fascia longitudinal seam.In order not ftracture, can be at the edge of side fascia promptly the seam crossing of two blocks of side fascias process meet the conventional degree of depth of building and width tongue and groove to be connected processing.For guaranteeing that the side fascia seam does not ftracture and protects and levy the wallboard exterior appearance, this tongue and groove is through following processing: smear the skim clay on the core of tongue and groove bottom, alkali plastic-coated fiberglass gridding cloth in this clay upper berth one deck, spread one deck clay, layer of glass fiber fabric, one deck clay more in succession, after treating tongue and groove junction health drying, with the polishing of tongue and groove place, make it to flush with the plate face of two blocks of side fascias, there is not tangible seam vestige.Certainly can spread more multi-layered clay and glass cloth.For realizing the high-strength of side fascia, the core top and bottom can have vertical direct through groove of different shape, the tension reinforcing steel bar that has two ends to link to each other in it, and top and bottom can have relative transverse groove, and the reinforcing bar that holds core is housed in it.
Second purpose of the present invention is achieved in that to be that the production technology of novel external wall plate may further comprise the steps:
A. mould is prepared, and comprising: the side fascia mould is put on the formwork platform, uses tensioning equipment stretching on request or tension with some following stiffeners, make it have stretch-draw prestressing force or non-prestressed; Core is put on the above-mentioned reinforcing bar, makes reinforcing bar be positioned at vertical direct through groove of core, on request above the stretch-draw if interconnect in the bar stiffener and at the core two ends; Colligation transverse reinforcement in the transverse groove of core; Can as being stacking transportation or health,, load onto several dismountable positioning strips on demand with being put on the formwork platform behind die flip 180 degree,
B. spread first layered material, the material that is about to stir preferably uses hopper to drain to automatically downwards and waits to pave on the face, and wipes off through the vibration scraper plate; Follow tiling first floor fiberglass gridding cloth on the underlying material of having completed, and wipe off with the vibration scraper plate,
C. b set by step spreads second layered material and second layer fiberglass gridding cloth, and wipes off with the vibration scraper plate,
D. b set by step spreads the 3rd layered material, wipe off equally with the vibration scraper plate,
E. at least through step b, c, d each once after, with the plate face health drying that makes,
F. mould is turned over turnback together with the side fascia that makes one side,
G. repeating step b to e makes another side,
H. randomly, wash one of mill two faces of side fascia or two faces,
I. process the cooperation of side fascia and pay and tongue and groove, clay and glass cloth on the core upper berth of tongue and groove bottom.
The 3rd purpose of the present invention promptly implemented the production equipment of above-mentioned technology, mainly by mould, mould tensioning equipment, vibration wipe off device, glass arrange exhibits paperback put, install cooperate pay processing unit (plant) and in case of necessity plate face device for grinding form.Wherein mould is preferably made with shaped steel and round steel, and shaped steel is mainly used in the mould limit, comprises horizontal edge and longitudinal edge, and round steel is mainly used in lifting and the distortion of straightening die limit.The horizontal edge of mould can adopt welding or bolt or other fast methods to connect with longitudinal edge.Have several openings on the mould horizontal edge, in order to pass single reinforcing bar or bi-steel or steel rib.The tension reinforcing steel bar on alignment mode limit is housed on vertical mould limit.In addition, on mould two longitudinal edges lifting ear is arranged preferably, so that realize moving and 180 degree upsets of mould.Dismountable location batten also can be equipped with in mould bottom, becomes the buttress health to realize multiple layers of molds.Above-mentioned production line also comprises realizes that mould and semiproduct side fascia station move the device with health, can be transport vehicle, conveyer belt, hanging device etc., for ease of realizing automation, can make production line have track.
Novel external wall plate of the present invention not only has lightweight (light-weight), high-strength (high-strength), insulation (insulation), energy-conservation (energysaving), fire prevention (fire-proof), characteristics such as (quick-assembling) quick for installation, and can effectively prevent longitudinal seam cracking between the side fascia installation rear wall plate, the house that adopts this novel external wall plate to build also has good seismic resistance.
Side fascia production line of the present invention has solved the difficult problem of side fascia manual production, has changed the backward situation that squats down on the ground in the past and produce, and production efficiency improves greatly.Produce one 900 millimeters * 3000 millimeters * 120 millimeters side fascia, only need about one minute, productivity ratio has improved 5-10 doubly.
Description of drawings
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the longitudinal cross-section view of novel external wall plate of the present invention;
Fig. 2 is the lateral view of novel external wall plate shown in Figure 1;
Fig. 3 is I among Fig. 1
1The enlarged diagram of part;
Fig. 4 is I among Fig. 2
2The enlarged diagram of part;
Fig. 5 is a side fascia tongue and groove schematic diagram.
Fig. 6 is side fascia production procedure of the present invention;
Fig. 7 is the mould schematic diagram that is used to make side fascia of the present invention;
Fig. 8 is the mould tensioning equipment that is used to make side fascia of the present invention;
Fig. 9 is the vibration strickling device schematic diagram that is used to make side fascia of the present invention;
Figure 10 puts schematic diagram for the glass paperback of arranging exhibits;
Figure 11 is a plate face later stage device for grinding schematic diagram;
Figure 12 installs for side fascia and cooperates the processing unit (plant) schematic diagram of paying;
The specific embodiment
Novel external wall plate of the present invention adopts sandwich, is clipped between the top layer 2 with insulation, core 1 heat insulation, that fire proofing is made, and an end of core 1 protrudes the wallboard side, and the other end is recessed in wallboard, and projection cooperates with the recess formation pair.Certainly, also can all be protruding or all be recessed in the core two ends, pay as long as two blocks of side fascias can form to cooperate when connecting.Adopt the combination of this convex-concave mode between the wallboard, greatly improved the heat-insulating property of wallboard.This convex-concave surface is inside and outside circle in the embodiment shown in Figure 2, but also can be processed into other geometry, rectangle for example, and triangle, swallow-tail form, trapezoidal etc.The top and bottom of core 1 have vertical direct through groove 4 of different shape, the tension reinforcing steel bar 3 that has two ends to link to each other in it, and top and bottom can have relative transverse groove, the reinforcing bar 3 that holds core 1 are housed, as shown in Figure 4 in it.Bar construction has greatly improved the intensity of side fascia in the groove.Core 1 can be EPS, also can be fire proofings such as asbestos.Top layer 2 is made by magnesia oxychloride cement or GRC cement, sand and scoria, and wherein cement, sand and scoriaceous part by weight are generally 1: 1.0-2.8: 1.0-3.3 is preferably 1: 1.25-2.5: 1.25-2.5 most preferably is 1: 1.5-2.25: 1.5-2.0.Because core is compressible, therefore when side fascia expanded with heat and contract with cold, the distortion of core had remedied the deflection of the longitudinal seam cracking of side fascia.The side fascia width can be the various sizes that meet construction module, and length can be decided by instructions for use, generally is not more than 3000 millimeters.
Following table 1 is the coefficient of thermal conductivity contrast of foamed plastics and other building heat preservation heat-barrier material commonly used:
| Title material | Coefficient of thermal conductivity (W/m 2.K) | Insulation layer thickness (millimeter) when reaching same effect of heat insulation |
| Common brick concrete segment expansion diatomite jelutong bukit mineral wool polystyrene foam plastics rigid polyurethane foam plastics | 0.698 0.349 0.052 0.038-0.043 0.034-0.037 0.032-0.037 0.017-0.025 | 860 380 50 50 45 40 25 |
Insulation layer thickness table of comparisons when following table 2 reaches identical heat insulation effect for the unlike material constructional materials:
| Title material | Coefficient of thermal conductivity (W/m 2.K) | Insulation layer thickness (millimeter) when reaching same effect of heat insulation |
| Common brick concrete block EPS core | 0.68 0.348 0.032-0.037 | 860 380 40 |
In addition as shown in Figure 5, edge at side fascia, the i.e. seam crossing of two side fascia I and II, process the tongue and groove of degree of depth h and width b, for guaranteeing that the side fascia seam does not ftracture and guarantees the wallboard exterior appearance, this tongue and groove is through following processing: smear the skim clay on the core of tongue and groove bottom, at the wide identical middle alkali plastic-coated fiberglass gridding cloth of this clay upper berth one deck and plate, spread one deck clay more in succession, layer of glass fiber fabric, another layer clay, after treating tongue and groove junction health drying, with the polishing of tongue and groove place, make it to flush with the plate face of two blocks of side fascias, there is not tangible seam scar.Certainly also can spread more multi-layered clay and glass cloth.
Fig. 6 shows a kind of production procedure schematic diagram of side fascia, mainly comprises following processing step:
A. mould is prepared, and comprising: side fascia mould 5 is put on the formwork platform 6, uses tensioning equipment stretching on request or tension (referring to Fig. 7) with following some stiffeners 3, make it have stretch-draw prestressing force or non-prestressed; (Expansion benzeneplate of burning resistance) is put on the above-mentioned reinforcing bar with special-shaped benzene plate, on request some stiffeners above the stretch-draw; The colligation transverse reinforcement; Can as being stacking transportation or health,, load onto several detachable positioning strips on demand with being put on the formwork platform behind die flip 180 degree,
B. mould is lifted on the transport vehicle, spread first layered material at first station, the material that is about to stir preferably uses hopper to drain to automatically downwards and waits to pave on the face, and wipes off through the vibration scraper plate; Then at second station first floor fiberglass gridding cloth that on the underlying material of having completed, tile, and with vibrating the scraper plate strickling,
C. at next station, b spreads second layered material and second layer fiberglass gridding cloth set by step, and wipes off with the vibration scraper plate,
D. at next station, b spreads the 3rd layered material set by step, and is same with the strickling of vibration scraper plate,
E. the plate face health drying that has made,
F. mould is turned over turnback together with the side fascia that makes one side,
G. repeating step b to e makes another side,
H. randomly, wash two faces of mill side fascia, roughly grind earlier, the back correct grinding, the plate face dimensional accuracy behind the correct grinding is within 1 millimeter, and side fascia is sliding through especially flat lay the grain after washing mill, and directly coating or japanning need not be processed once more, decorate the duration thereby obviously shorten,
I. processing the cooperation of side fascia pays and tongue and groove.
Fig. 7 shows the mould of making side fascia of the present invention, preferably makes with shaped steel and round steel, and shaped steel is mainly used in the mould limit, comprises horizontal edge 6 and longitudinal edge 7, and round steel is mainly used in lifting and the distortion of straightening die limit.The horizontal edge of mould can adopt welding or bolt or other fast methods to connect with longitudinal edge.Have several openings on the mould horizontal edge, in order to pass single reinforcing bar or bi-steel or steel rib.The tension reinforcing steel bar 9 on alignment mode limit is housed, to guarantee mold shape on vertical mould limit.In addition, lifting ear 8 is arranged preferably on mould two longitudinal edges, so that realize moving and 180 degree upsets of mould.Dismountable location batten also can be equipped with in mould bottom, becomes the buttress health to realize multiple layers of molds.The dead size of mould (being product size) can be the various sizes that meet construction module, and its length depends on the needs, and generally is not more than 3000 millimeters.
Fig. 8 shows the mould tensioning equipment.This device is the key equipment of reinforcing bar in the tensioning mold, is made up of locator 10, stretch-draw clamping device 11, cut-out rivet clasp device 12 and regulating wheel 13.This tensioning equipment is located at both mold ends respectively.The direction of action of each parts when arrow is represented work among the figure.
Fig. 9 shows vibration and wipes device 23 off, and it is the key equipment that improves the quality of products.Side fascia is wipeed the processing of device to the bed of material off through vibration, makes the side fascia surface layer structure of making tight, and surface smoothing is convenient to later stage plate face and is handled.This vibration is wipeed device off and is comprised base 14, scaffold 15, following vibrating plate 16, upper vibrating plate 17, vibrator 18, flexible lifting gear 19, support spring 20 and scraper plate 21, the width of scraper plate 21 can be identical or different, the surface thickness difference that different scraper plates scrapes.
Figure 10 shows the glass paperback of arranging exhibits and puts, fiberglass gridding cloth 22 is through at least three nip rolls, be five parallel nip rolls 24 here after, fiberglass gridding cloth can be vertical mutually through, latitude grid, guarantee that fiberglass gridding cloth is in straightened condition, be convenient to flatten shop cloth.
Figure 11 shows plate face later stage device for grinding, is made up of the workbench 25 and the disk bistrique 26 of variable-ratio motion, and wherein mill is vertical with workbench, bistrique workbench vertical feed relatively (arrow P 1), and cutterhead 27 rotates along direction shown in the arrow R1.Wait to grind side fascia I and be fixed on the workbench, along arrow P 2 advance and retreat.
Figure 12 shows that the side fascia installation cooperates the processing unit (plant) of paying, side fascia I to be processed is fixed on the workbench 28 of variable-ratio motion, workbench 28 can be done feed motion along arrow P 3, and the crop 29 that two variable-ratios of the workbench left and right sides rotate can be along arrow P 4, P5 feed or withdrawing.The rotation of crop is vertical with workbench.According to the difformity of crop, can process difform cooperation and pay.Crop can be controlled penetraction depth and position.
At last, the production line of side fascia also can comprise carrying, health preserving equipment.Mould and be processed into half-finished side fascia and will realize moving and health between the station need be carried by production line, health preserving equipment.These devices can be transport vehicle, conveyer belt, hanging device etc., and moving between station also can pass through fixed mould or side fascia, and the processing treatment facility moves and realizes, promptly needs only and can realize required relative motion.Carrying, health preserving equipment are also reliable certainly artificial, but want much hard.
Novel external wall plate of the present invention, without any environment pollution, adopt mechanization production, the assembly site assembly, adopt parallel operations, can be widely used in various buildings, villa, factory building or structural wall etc. with 220 square metre of two floor villanette is example, and the construction phase, key-works are about fitted up the gypsum plank furred ceiling as long as can reach in 20 days, and interior wall is scraped Da Bai, exterior wall is coated with high grade paint, color steel watt, water power reaches the use standard, and such house is 750 yuan of every square metre of building areas only.
Claims (20)
1. light thermal-insulation side fascia, form by core and top layer, wherein core (1) is clipped between the top layer (2), one end of core (1) protrudes the wallboard side, the other end is recessed in wallboard, perhaps two ends are all protruding or all recessed, projection formed to cooperate with negative area and pays when two blocks of side fascias were connected, seam crossing at side fascia and another piece side fascia processes the tongue and groove that is covered with clay and glass cloth, core (1) top and bottom can have vertical direct through groove (4) of different shape, the reinforcing bar (3) that two ends link to each other is housed in it, and core (1) top and bottom have relative transverse groove, and the reinforcing bar (3) that holds core (1) is housed in it.
2. side fascia according to claim 1 is characterized in that, core (1) is a light heat insulation material.
3. side fascia according to claim 2 is characterized in that, described light heat insulation material is EPS or asbestos, rock wool.
4. according to each the described side fascia in the aforementioned claim, it is characterized in that top layer (2) are made by magnesia oxychloride cement or GRC cement, sand and scoria.
5. side fascia according to claim 4 is characterized in that, cement, sand and scoriaceous part by weight are 1: 1.0-2.8: 1.0-3.3.
6. side fascia according to claim 5 is characterized in that, cement, sand and scoriaceous part by weight are 1: 1.25-2.5: 1.25-2.5.
7. side fascia according to claim 6 is characterized in that, cement, sand and scoriaceous part by weight are 1: 1.5-2.25: 1.5-2.0.
8. two according to the seam method between each the described side fascia in the aforementioned claim, described tongue and groove is carried out following processing: on the core of tongue and groove bottom, be coated with three layers of clay, two-layer glass cloth at least, promptly smear the skim clay, alkali plastic-coated fiberglass gridding cloth in this clay upper berth one deck, spread one deck clay, layer of glass fiber fabric, one deck clay more in succession, after treating tongue and groove junction health drying,, make it to flush with the plate face of two blocks of side fascias with the polishing of tongue and groove place.
9. the production technology of light thermal-insulation side fascia may further comprise the steps:
A. mould is prepared, and is about to the side fascia mould and is put on the formwork platform; After being put into the side fascia mould on the formwork platform, use tensioning equipment stretching on request or tension with some following stiffeners, core is put on the above-mentioned reinforcing bar, make reinforcing bar be positioned at vertical direct through groove of core, on request some stiffeners above the stretch-draw and interconnect at the core two ends; Colligation transverse reinforcement in the transverse groove of core;
B. spread first layered material, the material that is about to stir is taped against to be waited to pave on the face, and wipes off through the vibration scraper plate; Follow tiling first floor fiberglass gridding cloth on the underlying material of having completed, and wipe off with the vibration scraper plate;
C. b set by step spreads second layered material and second layer fiberglass gridding cloth, and wipes off with the vibration scraper plate;
D. b set by step spreads the 3rd layered material, wipes off with the vibration scraper plate equally;
E. at least through step b, c, d each once after, with the plate face health drying that makes;
F. mould is turned over turnback together with the side fascia that makes one side;
G. repeating step b to e makes another side;
H. process the cooperation of side fascia and pay and tongue and groove, clay and glass cloth on the core upper berth of tongue and groove bottom.
10. production technology according to claim 9 is characterized in that, before operation b, with die flip 180 degree, loads onto several dismountable positioning strips, so that stacking.
11. production technology according to claim 9 is characterized in that, the dry good plate face of health is washed mill.
12. production technology according to claim 9 is characterized in that, the station of side fascia moves and can realize by transport vehicle.
13. make the mould that each the described side fascia in the claim 1 to 7 is used, its mould limit is made by shaped steel, comprise horizontal edge (6) and longitudinal edge (7), this horizontal edge and longitudinal edge interconnect, have a plurality of openings on the horizontal edge, in order to pass stiffener (3), the tension reinforcing steel bar (9) on alignment mode limit is housed on vertical mould limit.
14. mould according to claim 13 is characterized in that, horizontal edge is connected by bolt with longitudinal edge.
15. mould according to claim 13 is characterized in that, lifting ear (8) is housed on the mould longitudinal edge.
16. mould according to claim 13 is characterized in that, dismountable location batten is equipped with in mould bottom.
17. be used for making the equipment of each described side fascia of claim 1 to 7, comprise that mould (5), mould tensioning equipment, vibration wipe device, the glass paperback of arranging exhibits off and put, install to cooperate and pay a processing unit (plant), wherein the mould limit of mould is made by shaped steel, comprise horizontal edge (6) and longitudinal edge (7), this horizontal edge and longitudinal edge interconnect, have a plurality of openings on the horizontal edge,, the tension reinforcing steel bar (9) on alignment mode limit is housed on vertical mould limit in order to pass stiffener (3).
18. equipment according to claim 17 is characterized in that, also comprises plate face device for grinding.
19., it is characterized in that described mould tensioning equipment is made up of locator (10), stretch-draw clamping device (11), cut-out rivet clasp device (12) and regulating wheel (13) according to claim 17 or 18 described equipment.
20. use house or the wall construction built according to each the described side fascia in the claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01123380 CN1244744C (en) | 2001-07-17 | 2001-07-17 | External wall slab for building and its productive technology and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01123380 CN1244744C (en) | 2001-07-17 | 2001-07-17 | External wall slab for building and its productive technology and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1397698A CN1397698A (en) | 2003-02-19 |
| CN1244744C true CN1244744C (en) | 2006-03-08 |
Family
ID=4665028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01123380 Expired - Fee Related CN1244744C (en) | 2001-07-17 | 2001-07-17 | External wall slab for building and its productive technology and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1244744C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277911B (en) * | 2011-05-16 | 2013-04-03 | 西南科技大学 | Load-bearing self-thermal insulation wall body for casting in place and preparation method thereof |
| CN104047397A (en) * | 2014-06-05 | 2014-09-17 | 成都上筑建材有限公司 | Novel crack-preventing wall board |
| CN104120826B (en) * | 2014-07-21 | 2016-01-13 | 丹东市兄弟建材有限公司 | The filled wall of a kind of foam concrete composite board system and formation thereof |
| CN104612320A (en) * | 2015-02-04 | 2015-05-13 | 海安县东方特种建材有限公司 | Fireproof cement plate |
| CN104674964A (en) * | 2015-02-12 | 2015-06-03 | 沈阳建筑大学 | Grooved XPS board external wall heat insulation system |
| CN105442871A (en) * | 2015-12-04 | 2016-03-30 | 南京国电南自电网自动化有限公司 | Secondary equipment prefabricated cabin made of GRC material |
| CN110154220B (en) * | 2018-02-12 | 2021-10-19 | 南京善围建筑科技有限公司 | Preparation equipment and preparation method of prefabricated composite board |
| CN110757615B (en) * | 2019-11-14 | 2021-01-08 | 鲁南中联水泥有限公司新型建材分公司 | Cement board production process |
| CN113356467A (en) * | 2021-06-17 | 2021-09-07 | 青海平兴建设集团有限公司 | Prefabricated fireproof heat-insulation partition plate and assembling method thereof |
-
2001
- 2001-07-17 CN CN 01123380 patent/CN1244744C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1397698A (en) | 2003-02-19 |
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