2024年5月9日发(作者：)

BS 476-7-1997建筑材料和构件的燃烧试验 制品外表

火势蔓延的试验和分级方法

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BS 476 :

BRITISH STANDARD |

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Part 7 : 1997

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Fire tests on building

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materials and structures

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Part 7. Method of test to determine the

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