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METHOD OF MINING THICK STEEP DEPOSITS BY LEVEL-WISE CAVING-IN
METHOD OF MINING THICK STEEP DEPOSITS BY LEVEL-WISE CAVING-IN
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机译:高层掏矿开采深部矿床的方法。
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摘要
the invention относитс to mines and is дл снижени losses and разубоживани ore by увеличени output parameters. ore by создани разрыхленного sloore at the upper подэтаже. the first дл trapped wed
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