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METHOD OF MINING ADJOINING OUTBURST-PRONE SEAMS AT BORDERS OF MINE SECTIONS OR SAFETY COAL PILLARS
METHOD OF MINING ADJOINING OUTBURST-PRONE SEAMS AT BORDERS OF MINE SECTIONS OR SAFETY COAL PILLARS
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机译:在矿山或安全煤层的护壁处增设突围缝的方法
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