smoke height

问题描述:

smoke height
原文:The oxygen index for the propane results was taken
as 0.25 because propane does not have a smoke height in air.

网上软件翻译的结果是:氧指数为丙烷结果被攻取了为0.25因为丙烷不抽支烟,身高在空气中.
smoke height 大概是浓烟的意思吧.
取丙烷中氧的指标为25%,因为丙烷在空气中不产生浓烟.