This article explicated the theory of gas production technique in vitro, the factors that affect the quantity of gas production in vitro and its research foreground.
阐述了体外产气法的原理、影响体外产气量的因素及其研究前景。
A prediction of a gas emission quantity from a seam is an important measure to the mine safety production.
预测煤层瓦斯涌出量是煤矿安全生产的一个重要措施。
The large quantity of toxic and harmful sewage with complex components and high density, which is discharged in the course of the coal gas production, is a kind of hard-treated industrial sewage.
在煤气生产过程中排出大量有毒有害污水，其水量大、成分复杂、浓度高，是一种很难处理的工业污水。
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