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Date: 2013-10-22 20:55:58Oxide minerals Mining in the Democratic Republic of the Congo Conflict minerals Minerals Mining in Rwanda Coltan Tantalum Wolframite Columbite Matter Chemistry Natural resources | tpm-conflict-materials-policyAdd to Reading ListSource URL: www.trueprecisionmachining.comDownload Document from Source WebsiteFile Size: 187,29 KBShare Document on Facebook |