标准名称：BS 476-21-1987 Fire tests on building materials and structures. Methods for determination of the fire resistance of loadbearing elements of construction
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更新日期：2011年11月13日
内容简介
BS 476-21-1987 Fire tests on building materials and structures. Methods for
determination of the fire resistance of loadbearing elements of construction
determination of the fire resistance of loadbearing elements of construction
