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Interactions Between Multiple Seam Longwall and Room-and-pillar Operations
Gregory J. ChekanRudy J. Matetic
其他書名
A Case Study in Boone County, WV
出版U.S. Department of the Interior, Bureau of Mines, 1990
URLhttp://books.google.com.hk/books?id=g_awarcg_h4C&hl=&source=gbs_api
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