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METHOD OF STAGEWISE MINING OF DEEP OPEN PITS
METHOD OF STAGEWISE MINING OF DEEP OPEN PITS
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机译:深露天开采的分段开采方法
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摘要
1.a phased development of deep pits, it ший assignment р да intermediate contours of career, распопожение workers stepped angle to простиранию lie the енного, temporarythe workers stepped intermediate
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