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exterior aluminium glass bifold door heavy duty 4m bi folding door on China WDMA on China WDMA

exterior aluminium glass bifold door heavy duty 4m bi folding door  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...
color :
Light Yellow

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