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