photoelectric smoke-density controller 光电烟密度控制器
smoke density meter 烟密度测量器 ; [环境] 烟浓度计
smoke density rank 烟密度等级
Smoke density grade 烟密度等级
smoke density factor 烟雾密度因数
Spotters must take hours of training to master such concepts as smoke density, measured in 'Hartridge units.
检举员必须接受数小时的培训，才能掌握以“哈特·里奇烟度单位”(Hartridge unit)计算的“烟浓度”之类的概念。
Mixing Hydrogen with diesel fuel in model S195 diesel engine, the producing of smoke density is lower in all working conditions.
S195柴油机掺氢燃烧在所有工况下，烟度都有新降低。
Products have perfect flame resistance and can be inner colored, and its smoke density and toxicity is lower, its security is better.
制品阻燃性能极佳，低发烟，低毒性，安全性能高，可实现内着色。
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