qq250083771 2014/05/02
BS EN 13501-1-2002 Fire classification of construction products and building ele..pdf 44页,我也看不懂,看看是你需要的不
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BS-EN-13501-3-2005 Fire classification of construction products and building elements — Part 3: Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers