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Date: 2016-06-16 22:40:14Chemical elements Transition metals Refractory metals Noble metals Native element minerals Conflict resource Tantalum Ore Tin Minsur China Minmetals Smelting | sgma_horiz_logo_reg_colorAdd to Reading ListSource URL: sigmatronintl.comDownload Document from Source WebsiteFile Size: 274,69 KBShare Document on Facebook |