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Removing Pyrite from Coal by Dry-separation Methods
W. T. AbelM. ZulkoskiG. A. BradyJ. W. Eckerd
出版U.S. Department of Interior, Bureau of Mines, 1973
URLhttp://books.google.com.hk/books?id=rETolv4YLlEC&hl=&source=gbs_api
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