gas extraction meaning in English

气体抽取
气体提炼
天然气的开采

Theory and practice of integrated coal mining and gas extraction
采煤采气一体化理论与实践
Numerical modeling of gas extraction by relief pressure from a long - distance
远程卸压瓦斯抽放数值模拟
Construction technique of foam method for drilling long gas extraction hole
泡沫法施工瓦斯抽放长孔工艺
Several key problems in optical design for movable gas extraction system
移动式瓦斯抽放系统优化设计中的关键问题
Oil and gas extraction
石油及气体抽取

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