MECHANIZED LONGWALL MINING IN STEEP SEAMS

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作者：

HARTLEY, G

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来源：

CANADIAN MINING AND METALLURGICAL BULLETIN | 1971年 / 64卷 / 714期

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中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

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页码：20 / &

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