抽放瓦斯 meaning in Chinese

drawing out methane

Advanced technology of electrophotography in japan
抗静电抽放瓦斯矿用塑料管的研制
Gas drainage and utilization in coal mines of china
中国煤矿抽放瓦斯和利用
Roof roadway methane drainage test and its effect analysis
顶板巷道抽放瓦斯试验与效果分析
Construction technology of bended bore hole drilling for gas drainage
抽放瓦斯弯曲钻孔施工技术
Comprehensive gas drainage method with long directional drilling hole
定向长钻孔综合抽放瓦斯方法

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