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Comparative Laboratory Evaluation of Resin-grouted Roof Bolt Elements

John R. BartelsDeno M. Pappas

出版	U.S. Department of the Interior, Bureau of Mines, 1985
URL	http://books.google.com.hk/books?id=Xsu0k1nHcToC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN