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The Use of Rock Bolts Or Wire Rope to Increase the Strength of Fractured Model Pillars

Frank G. HorinoWilbur I. DuvallBruce T. Brady

出版	U.S. Department of Interior, Bureau of Mines, 1971
URL	http://books.google.com.hk/books?id=mDUSUqg4KtkC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN