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    Study on increasing coal-drawing rate by crack

    时间:2013-03-14 23:47来源:未知 作者:admin点击:200次
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    Song Xuanmin, Qian Minggao, and Jin Zhongming , Study on increasing coal-drawing rate by crack coupling technique in mechanized sublevel caving face, Proceedings of the International Mining Tech’97 Symposium, Shanghai, China, 7-9 October, 1997

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