霍尔辛赫煤矿松软煤层瓦斯钻孔维护装置研发与应用

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申忠生刘明义

Development and Application of Gas Drilling Maintenance Device in Soft Coal Seam in Holsinghe Coal Mine

SHEN Zhongsheng LIU Mingyi

现代矿业 . 2020, (09): 173 -176 .