A molecular cloud is a region containing cool interstellar gas and dust left over from the formation of the galaxy and mostly contains molecular hydrogen.
分子云是一个包含冷却星际气体和尘埃的区域，这些气体和尘埃是星系形成之后的残留物，主要由氢分子组成。
By analyzing and researching utilization of BF dust, a technology of dealing with the BF gas slime adopting the containing carbon pellet direct roasting reduction method was put forward.
通过对攀钢高炉粉尘利用的分析研究，提出了采用含碳球团直接还原焙烧法处理高炉瓦斯泥的工艺。
Centrifugal fans used for transporting gas containing kinds of dust work at high particle concentration.
用于排放、输送含尘气体的离心通风机，都是在高颗粒浓度环境下工作。
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