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Experimental Longwall Mining in a Pennsylvania Anthracite Mine
Wilbert T. MalenkaUnited States. Bureau of MinesRobert J. Brennan
其他書名
(in Two Parts) : 2.- Use of a Shearer Loader
出版U. S. Department of the Interior, Bureau of Mines, 1966
URLhttp://books.google.com.hk/books?id=mugVywEACAAJ&hl=&source=gbs_api