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METHOD OF GAS DRAINAGE FROM COAL SEAM WHILE LONG-PILLAR MINING
METHOD OF GAS DRAINAGE FROM COAL SEAM WHILE LONG-PILLAR MINING
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机译:长柱开采中煤层瓦斯抽放方法
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摘要
the invention относитс to the case and can be used дл combat газовыделением. the purpose of изобретени - efficiency of degassing and reducing economic cost by исключени применени дегазационных pi
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