NFPA 270 在单一密闭房间使用圆锥型辐射热度量烟模糊度标准试验方法
日期:2012-02-10 14:50
hod is the mass optical density, which is the specific optical density of smoke divided by the mass lost by the specimens during the test.
The 2008 edition deleted secondary definitions of ignition, smoke obscuration, and specimen. (Softbound, 29 pp., 2008)
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