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Date: 2016-06-14 06:49:55Coal mining Economic geology Geology Western United States Mining Coal preparation plant Coal Longwall mining Powder River Basin Surface mining | MEDIA PACK 2016 THE LEADING MONTHLY MAGAZINE FOR THE GLOBAL COAL INDUSTRY Expert technical articles covering the key technological developments in the mining,Add to Reading ListSource URL: www.worldcoal.comDownload Document from Source WebsiteFile Size: 2,52 MBShare Document on Facebook |