NFPA 258 固体材料发烟量测试方法
日期:2012-02-10 14:40
s subsequently been developed using an improved-design radiant heat source within the same closed chamber.
1.1.3* Test results are expressed in terms of specific optical density, which is a dimensionless property derived from the measured light transmission and geometric easurements of the chamber and the specimen.
1.1.4 This test is intended to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled conditions. It is not intende
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