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Short-delay Blasting in Underground Coal Mines

Richard J. MainieroHarry C. Verakis

出版	U.S. Department of the Interior, Bureau of Mines, 1986
URL	http://books.google.com.hk/books?id=gft4C9awZ0gC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN