gas drainage
短語詞組
- gas pre -drainage 瓦斯抽放;預(yù)抽瓦斯
- progressive gas pre -drainage 遞進預(yù)抽
- comprehensive gas -drainage 綜合抽采
- gas -drainage problem 抽采問題
- the effect of gas -drainage 抽采效果
- gas drainage pressure -equalized ventilation 均壓通風(fēng)
- coal -bed gas drainage 煤層氣抽放
- large -diameter gas drainage well 大孔徑瓦斯抽放孔 返回 gas drainage