aluminium frames double glass accordion window cost on China WDMA for UK
aluminium frames double glass accordion window cost Product Description Company Information Packaging & Shipping Project Case Performance Performance Themal insulation 3.8≥ 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~ 4.0 Kpa...
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