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Hot Milling of Rock-drill Bits at the Mines of the Vinegar Hill Zinc Co., Platteville, Wis

Wing G. Agnew

出版	U.S. Department of the Interior, Bureau of Mines, 1936
URL	http://books.google.com.hk/books?id=j2WorbHS0NkC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN