CN117166688A - TPO waterproof coiled material metal inclined roof construction technology - Google Patents
TPO waterproof coiled material metal inclined roof construction technology Download PDFInfo
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- CN117166688A CN117166688A CN202311174607.7A CN202311174607A CN117166688A CN 117166688 A CN117166688 A CN 117166688A CN 202311174607 A CN202311174607 A CN 202311174607A CN 117166688 A CN117166688 A CN 117166688A
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- waterproof coiled
- waterproof
- coiled materials
- coiled material
- fixing
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- 239000000463 material Substances 0.000 title claims abstract description 79
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 18
- 239000002184 metal Substances 0.000 title claims abstract description 18
- 238000005516 engineering process Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 18
- 238000004078 waterproofing Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000002474 experimental method Methods 0.000 claims abstract description 5
- 238000004381 surface treatment Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 41
- 239000012528 membrane Substances 0.000 claims description 13
- 230000037303 wrinkles Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 19
- 230000008602 contraction Effects 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract description 3
- 239000011241 protective layer Substances 0.000 abstract description 3
- 239000003550 marker Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000002354 daily effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/254—Roof garden systems; Roof coverings with high solar reflectance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/32—Roof garden systems
Landscapes
- Building Environments (AREA)
Abstract
The invention relates to the technical field of waterproof construction, in particular to a TPO waterproof coiled material metal sloping roof construction process. The whole set of construction is completed through the steps of basal surface treatment, pre-paving of waterproof coiled materials, paving of the waterproof coiled materials, fixing of the waterproof coiled materials, paving of waterproof additional layers above the fixing gaskets, treatment of detail nodes of the waterproof coiled materials, water closing, water spraying experiments and acceptance inspection. According to the construction method, coiled materials are fixed on the profiled steel sheet through the fixing gasket, the temperature change difference of the profiled steel sheet and the waterproof coiled materials due to the temperature influence is effectively prevented, the TPO waterproof coiled materials are empty and drop due to the influence of thermal expansion and contraction, the waterproof coiled materials are firmly bonded and do not drop, a waterproof additional layer is paved on the fixing gasket, and a waterproof protective layer is further arranged at the joint of the fixing gasket and the waterproof coiled materials, so that the waterproof requirement of waterproofing and no leakage is met.
Description
Technical Field
The invention relates to the technical field of waterproof construction, in particular to a TPO waterproof coiled material metal sloping roof construction process.
Background
Nowadays, steel construction engineering is more and more popular in our life, especially large-scale stadium and various exhibition halls, in metal roofing waterproof engineering roofing waterproofing generally paste self-adhesion waterproofing membrane in the middle floor of metal roofing and reach the water-proof effects, and this kind of way is convenient but directly construction metal surface course above the waterproofing membrane after waterproofing membrane construction finishes thereby leads to not having waterproof protection layer, thereby metal sheet and waterproofing membrane are after undergoing the difference of temperature expansion coefficient of round clock difference change two kinds of materials thereby lead to the waterproofing membrane to produce a large amount of hollows until drop. Especially in the great metal roofing of slope, waterproofing membrane produces the empty many scope of drum extensively, thereby waterproofing membrane bonds insecurely and drops.
Disclosure of Invention
The invention aims to solve the problems, thereby providing a TPO waterproof coiled material metal inclined roof construction process for preventing the waterproof coiled material from falling along an inclined plane.
The invention solves the problems, and adopts the following technical scheme:
a TPO waterproof coiled material metal sloping roof construction process comprises the following steps:
s1: and (3) basal surface treatment, namely finishing construction of the profiled steel sheet on the roof and firmly connecting the profiled steel sheet with the lower component.
S2: pre-paving waterproof coiled materials, typesetting the waterproof coiled materials, paving the waterproof coiled materials perpendicular to the long side direction of the profiled steel sheet, reserving lap joint length, overlapping the waterproof coiled materials by 150mm in the length direction, and overlapping the waterproof coiled materials by 70-80 mm in the width direction.
S3: laying waterproof coiled materials, firmly rolling and bonding by a roller until no empty drum wrinkles are generated, and welding and sealing the lap joint by adopting a hot air welding mode.
S4: the waterproof coiled material is fixed, a fixed gasket is placed at the bonding wire of the waterproof coiled material, and the fixed gasket is fixed on the wave crest of the pressed steel plate through a self-tapping screw.
S5: and a waterproof additional layer is paved above the fixed gasket, and a hot air welding mode is adopted to weld and seal between the edge of the waterproof additional layer and the coiled material.
S6: and (5) processing the detail nodes of the waterproof coiled material.
S7: closing water and spraying water.
S8: and (5) checking and accepting.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
according to the construction method, coiled materials are fixed on the profiled steel sheet through the fixing gasket, the temperature change difference of the profiled steel sheet and the waterproof coiled materials due to the temperature influence is effectively prevented, the TPO waterproof coiled materials are empty and drop due to the influence of thermal expansion and contraction, the waterproof coiled materials are firmly bonded and do not drop, a waterproof additional layer is paved on the fixing gasket, and a waterproof protective layer is further arranged at the joint of the fixing gasket and the waterproof coiled materials, so that the waterproof requirement of waterproofing and no leakage is met.
Preferably, the invention further adopts the technical scheme that:
the diameter of the fixed gasket is 60mm, and the distance between the circular centers of the fixed gaskets and the bridging line is 30mm.
The fixed gaskets are arranged at intervals of 900mm along the length and width directions of the waterproof coiled material.
The size of the waterproof additional layer is 150 x 150mm.
Description of the embodiments
The invention is further described below in connection with the following examples which are provided for the purpose of better understanding of the present invention and are, therefore, not to be construed as limiting the scope of the invention.
A TPO waterproof coiled material metal sloping roof construction process comprises the following steps:
s1: the base surface treatment, namely finishing construction of the profiled steel sheet on the roof and firmly connecting the profiled steel sheet with the lower component, wherein the profiled steel sheet is plated with aluminum and zinc with the thickness of 0.6mm, and the model is YX6-103-927; checking the stability of the roof, ensuring the stability of the waterproof system only by ensuring the number of the metal roof profiled steel sheet fixing pieces to reach the design standard (according to the calculation and the determination of the wind load of the roof), cleaning the base surface of the roof before construction, cleaning the base surface, removing sharp foreign matters of the roof, leveling and smoothing the joint of two aluminum veneers, and ensuring that the studs at the fixing positions of the studs are free from bulges.
S2: pre-paving waterproof coiled materials, typesetting the waterproof coiled materials, paving the waterproof coiled materials perpendicular to the long side direction of the profiled steel sheet, reserving lap joint length, overlapping 150mm in the length direction of the coiled materials, overlapping 70-80 mm in the width direction, overlapping the lap joint parallel to the ridge along the running water direction, and overlapping the lap joint perpendicular to the ridge along the annual maximum frequency wind direction; the accurate lofting is carried out before construction, joints are reduced, joint positions are arranged, the joints are staggered by at least 30cm, the joint surfaces of the welded joints are wiped clean, the dew point is avoided, and oil stains and attachments are avoided; the coiled materials laid on the same day are welded on the same day, so that the construction at the highest temperature point in summer and the lowest temperature point in winter is avoided, and the expansion caused by heat and the contraction caused by cold are prevented; the joint left after construction every day is protected by adopting an adhesive tape and an effective mode, so that rain and damp are avoided; the components protruding out of the roof are fixed on the periphery of the components by using a head collecting pressing strip, the screw spacing is 200mm, water-stopping sealing paste is poured between the coiled material and the base surface, and the upper end of the head collecting pressing strip is sealed by using external sealing paste; the fixing parts at the periphery and the corners of the roof are encrypted by the following method:
the peripheral area of the roof is covered by a peripheral coiled material with the width of 1.0 meter or a row of fixing pieces are added in the middle of the coiled material, and the large-surface coiled material is covered by a uniform coiled material with the width of 20cm and welded by hot air;
a row of fixing pieces are added in the middle of a peripheral coiled material with the width of 1.0 meter or two rows of fixing pieces are added in the middle of a common coiled material, and a 20cm wide homogeneous coiled material is used for covering and hot air welding on a large-surface coiled material;
s3: laying waterproof coiled materials, firmly rolling and bonding by a roller until no empty drum wrinkles are generated, and welding and sealing the lap joint by adopting a hot air welding mode.
An automatic hot air welding machine or a handheld hot air welding machine and a silicone rubber roller are used, the power of the automatic hot air welding machine model VARIMA is 5.4KW, the power of the handheld hot air welding machine model ELECTRON is 1.6KW, TPO waterproof coiled materials are welded through hot air, and when the roof gradient exceeds 1/13, the handheld hot air welding machine is used. The lap joint part should not be subjected to welding leakage or over welding; when an automatic welding machine is used, heating is set to 538 ℃ under the condition of 3-4 m/min. Meanwhile, the ambient temperature has corresponding influence on the welding temperature and speed, and the lower the ambient temperature (and the coil temperature), the slower the speed of the automatic hot air welding machine should be regulated and controlled to ensure the welding quality. At the beginning of the daily morning and afternoon, or when any change in the base course or climate conditions occurs, test cuts must be made to determine the optimal welding temperature and speed by inspection of the welding quality. The construction at the highest point and the lowest point of the air temperature in one day is avoided, and the shrinkage of temperature change materials at the lap joint position of the waterproof coiled material and the metal aluminum plate is prevented from generating large-area hollows due to heat expansion and cold contraction.
Since the general temperature in the morning is low, the speed setting of the welding machine in the early morning should be lower than the midday speed. As the web surface temperature increases, the speed of the welder should also increase, and as the web enters the shade area under direct sunlight, the welder temperature or speed may need to be adjusted. Darker coils (e.g., grey) will absorb more heat than white, potentially affecting the welding speed. For dew, rain or fog caused by moisture on the coil, which may reduce the heat of overlap, it is necessary to adjust the welding temperature (increase) or the running speed (decrease) of the welder; before welding the lap joint, the weld surface must be wiped off of water. The wind has a cooling effect when it is blown over the surface. It will affect the air flow in the overlap area and reduce the efficiency of the hot air gun. At this time, the operator is required to increase the heating value of the hot air gun or to decrease the welding speed.
The base layer differs greatly in the amount of heat required to create a proper heat welded joint, the automatic welding device should be adjusted accordingly, the plywood and concrete act as a heat sink, a higher temperature or lower speed of operation is required compared to the insulation, and a higher temperature or lower speed setting is required for a cold-wet base layer than for a dry base layer.
TPO waterproofing membranes, if properly welded, will not "bleed" the membrane solution from the seam, and if bleed (melting and flowing of the dark bottom surface of the membrane begins) occurs, the welding speed should be increased to reduce the welding temperature.
Welding of the coil:
the hot air welder was prepared and preheated for about 5-10 minutes to reach operating temperature, mechanically fixed to site lap joint, minimum lap joint width 150mm, and weld width of at least 40mm was ensured.
Before seaming, the automatic hot air welder is set in place, the guide handle points to the same direction as the machine moves along the seam, and when the overlapped coiled material sheet is lifted, the blowing nozzle of the automatic hot air welder is inserted between the overlapped parts, the machine is immediately started to move along the seam so as to prevent burning out of coiled materials, the small guide wheel at the front part of the machine is aligned with the edge of the upper sheet along the seam, and the cable is ensured to be loose so as to prevent the machine from being pulled out of a running channel.
All joints are crossed, a silicone roller is used for rolling the joints to ensure continuous joints of hot air welding seams, surface irregularities caused by the multi-layer thickness of the TPO waterproof coiled material can cause false welding, and when the 1.2 mm thick TPO waterproof coiled material is used, the surface lap joint of the TPO non-reinforced flashing is necessarily positioned above all T-shaped joint lap joints.
The automatic hot air welder is removed from the finished seam, the machine motion is stopped, the nozzle is immediately removed from the seam area, no wrinkles passing through the hot weld area are guaranteed, the wrinkles in the overlap area must be cut off, the ends of the hot air weld seam must be marked for easy identification by a water-soluble marker, the welding is performed in the area between the stop and restart of the automatic hot air welder, a hand-held welder is needed, when the work starts every morning and afternoon, trial welding should be performed to determine the proper welding temperature and speed when the base or climate changes, an automatic operator applies foot pressure to the coil, kicks and slides the coil under the automatic device to keep the coil tightly attached, the operator always stands on the unfixed sheet to prevent sheet displacement, does not loosen foot pressure until the pinch roller rolls to keep the coil in place on the coil before the foot, the welding guide rail is longitudinally arranged along the seam and is close to the air baffle wheel to reduce the influence of coil displacement caused by the automatic device welding process, the operator must continue to apply foot pressure to the welding guide rail to help maintain the coil overlap positioning, and thus can effectively prevent creep or coil wrinkle surface displacement.
Setting of the hand-held welder for flashing should be about "6" (on a scale from 1 to 10), setting of the hand-held welder for coiled materials should be about "8" (on a scale from 1 to 10), accurate setting will vary depending on ambient temperature, base layer and welder type, the silicone roller should always roll the perpendicularly welded coiled materials or flashing, seam testing recommends using seam detection tools to test all hot air welds, test seams must be done after hot air welds cool down, hot air welds must be tested at any time to check weld quality and make proper adjustments to hot air welding equipment, handling of defective parts can be done periodically daily before the end of each working day, let hot air welds cool down sufficiently for about 30 minutes, early detection may destroy hot welds, draw seam detection tool tips along hot air weld edges, apply a certain pressure to detect weld connections, but not be inserted into the bottom layer, if the seam detection tools insert into the lap zone, use water-soluble marker on edge gap or crease start end to make a water-soluble marker on the coiled materials, repair the weld should be done completely by hand-held marker, and repair the weld should be done completely after the weld has been done by hand-held marker, if the repair of the weld meets the requirements of the weld has been done, and the repair is done by a water-soluble marker, if the weld is completely has been done, and the repair is done by a repair on the weld is done, if is done, and the repair is done by a repair is done.
S4: the waterproof coiled material is fixed, a fixing gasket is placed at the bonding wire of the waterproof coiled material and is used as a fixing piece, and the fixing gasket is fixed on the wave crest of the profiled steel sheet through self-tapping screws.
The diameter of the fixing piece is 60mm, the distance between the circular centers of the fixing gaskets and the bridging line is 30mm, the effective length of the bolts is 4 x 25mm, and the effective length of the bolts is more than or equal to 20mm;
the fixed shims were spaced 900mm apart along the length and width of the web.
S5: and a waterproof additional layer is paved above the fixed waterproof gasket, and the edge of the waterproof additional layer and the coiled material are welded and sealed in a hot air welding mode. The size of the waterproof additional layer is 150 x 150mm.
S6: the treatment of the detail joints of the waterproof roll is necessary to provide a fixation at every roofing elevation change, roofing section, deformation joint, protrusion, skylight etc. perimeter, at any internal angle change with a slope exceeding 170, at all penetration sites. The maximum center-to-center spacing of the web fasteners should be 300mm and the fasteners should be positioned between 150mm and 230mm from the female/male corner.
S7: the water-blocking and water-spraying experiment is carried out, the water surface height of the roof water-blocking experiment is at least 20cm, twenty-four hours in summer and forty-eight hours in winter, whether the water surface is obviously reduced or not is observed in the period, whether leakage exists below the roof is observed to check whether the waterproof construction is qualified or not, a water-spraying pipe network is installed on the topmost layer of the roof when the water-spraying experiment is carried out on the inclined plane and the vertical plane, the pipe network is established by adopting PPR pipe with the pipe diameter of DN25mm when the water-spraying inspection is carried out continuously, the pipe network hole distance is 10cm, the aperture is 3mm, water flows downwards along the wall from the top layer, and the total water-spraying time is not less than 12 hours; all windows on the wall surface should be closed before the water spraying water pressure is not lower than 0.3Mpa, the water spraying pipe should ensure that every corner of the outer wall body can be covered, the water spraying pipe is effectively fixed, the water spraying pipe is not deformed, a fixing or hanging tool is required to be used for treatment under the condition that the deflection of the PPR pipe is too large to meet the effective water spraying, the water pressure of the furthest water spraying endpoint is not less than 1.5kg and not more than 3kg, the water spraying pipe is 80mm away from the surface of the outer wall, the water spraying holes are uniformly distributed in a straight line, two rows of water spraying holes are arranged, the direction forms an included angle of 90 degrees, the aperture is 3mm, and the hole spacing is 100mm. And (3) checking the water at the 2 nd hour, the 4 th hour, the 8 th hour and the 12 th hour after the water spraying is started comprehensively, and checking whether the water seepage condition exists at the joint positions of all the outer wall bodies and doors and windows in the sprayed range or whether the leakage condition exists in an observation room after heavy rain. If no leakage phenomenon exists, the waterproof engineering is accepted as acceptable.
S8: and (5) checking and accepting.
According to the construction method, coiled materials are fixed on the profiled steel sheet through the fixing gasket, the temperature change difference of the profiled steel sheet and the waterproof coiled materials due to the temperature influence is effectively prevented, the TPO waterproof coiled materials are empty and drop due to the influence of thermal expansion and contraction, the waterproof coiled materials are firmly bonded and do not drop, a waterproof additional layer is paved on the fixing gasket, and a waterproof protective layer is further arranged at the joint of the fixing gasket and the waterproof coiled materials, so that the waterproof requirement of waterproofing and no leakage is met.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the claims, and all equivalent changes made in the practice of the present invention are included in the scope of the claims.
Claims (4)
1. A TPO waterproof coiled material metal inclined roof construction process is characterized in that: the method comprises the following steps:
s1: the base surface treatment, namely finishing the construction of the profiled steel sheet on the roof and firmly connecting the profiled steel sheet with the lower component;
s2: pre-paving waterproof coiled materials, typesetting the waterproof coiled materials, paving the waterproof coiled materials perpendicular to the long side direction of the profiled steel sheet, reserving lap joint length, overlapping the waterproof coiled materials by 150mm in the length direction, and overlapping the waterproof coiled materials by 70-80 mm in the width direction;
s3: laying waterproof coiled materials, rolling and bonding by a roller until no empty drum wrinkles exist, and welding and sealing the lap joint by adopting a hot air welding mode;
s4: fixing the waterproof coiled material, placing a fixing gasket at the bonding wire of the waterproof coiled material, and fixing the fixing gasket on the wave crest of the pressed steel plate through a self-tapping screw;
s5: a waterproof additional layer is paved above the fixed gasket, and a hot air welding mode is adopted to weld and seal between the edge of the waterproof additional layer and the waterproof coiled material;
s6: processing the detail nodes of the waterproof coiled material;
s7: closing water and spraying water experiments;
s8: and (5) checking and accepting.
2. The TPO waterproofing membrane metal sloping roof construction process according to claim 1, characterized in that: the diameter of the fixed gasket is 60mm, and the distance between the circular centers of the fixed gaskets and the bridging line is 30mm.
3. The TPO waterproofing membrane metal sloping roof construction process according to claim 1, characterized in that: the fixed gaskets are arranged at intervals of 900mm along the length and width directions of the waterproof coiled material.
4. The TPO waterproofing membrane metal sloping roof construction process according to claim 1, characterized in that: the size of the waterproof additional layer is 150 x 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311174607.7A CN117166688A (en) | 2023-09-13 | 2023-09-13 | TPO waterproof coiled material metal inclined roof construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311174607.7A CN117166688A (en) | 2023-09-13 | 2023-09-13 | TPO waterproof coiled material metal inclined roof construction technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117166688A true CN117166688A (en) | 2023-12-05 |
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ID=88942739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311174607.7A Pending CN117166688A (en) | 2023-09-13 | 2023-09-13 | TPO waterproof coiled material metal inclined roof construction technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117166688A (en) |
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2023
- 2023-09-13 CN CN202311174607.7A patent/CN117166688A/en active Pending
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