drill hole along coal seam的意思|示意
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沿煤层钻孔
drill hole along coal seam的网络常见释义
顺层钻孔 ...词: 瓦斯抽采; 顺层钻孔; 有效抽采半径; 抽采负压; 数值模拟 [gap=632]Key words: gas extraction; drill hole along coal seam; effective gas drainage radius; drainage negative - pressure; numerical simulat..