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Modern design double glass folding window accordion windows cost on China WDMA

Modern design double glass folding window accordion windows cost Product Description   Company Information   Packaging & Shipping   Project Case Performance Performance  Themal insulation 3.0≥  U≥2.0 W/m2k 3~6 level   Accusic  performance  28db ~ 40db  2 ~ 4 level   Water tightness  350~600Pa 4~8 level    Air tightness  5.5m3/(m2·h) 5 level    Wind load resistance 3.0~...
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China Windows and Doors Manufacturers Association

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