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Protective Structures for Low-coal Shuttle Car Operator

John R. BartelsUnited States. Bureau of MinesAugust J. KwitowskiWilliam D. Mayercheck

出版	U.S. Department of the Interior, Bureau of Mines, 1987
URL	http://books.google.com.hk/books?id=HDCKAQAACAAJ&hl=&source=gbs_api