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METHOD OF DEGASSING UNDERCUT COAL SEAMS IN PILLAR MINING SYSTEM
METHOD OF DEGASSING UNDERCUT COAL SEAMS IN PILLAR MINING SYSTEM
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机译:煤层开采系统中煤层下煤层的除气方法
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摘要
снособ degassing подрабатываемых уголбных seams at stolbovoy island system design, including the drilling of preparatory faces of reservoir in front of wellsparallel to the line of control забо , seal
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