The feature extraction of gas disaster is studied.
对瓦斯灾害信息特征提取进行了研究。
Extraction method of landfill gas was introduced based on practice experience.
并根据实践经验介绍了抽取填埋气体的方法。
The gas extraction effects is related to negative pressure of suction.
顶板瓦斯高抽巷的抽采效果与抽放负压直接相关。
The value of the gas extraction individually is far lower than the coal value.
瓦斯单独开采的价值远远低于煤炭本身。
An air extraction hood must be switched on during operation of the gas cooktop.
一个抽气罩必须开启燃气灶具期间的操作。
An air extraction hood must be switched on during operation of the gas cooktop.
一个抽气罩必须开启燃气灶具期间的操作。
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