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No Author. Mill News. Vol. XXII, no. 16 (Oct. 14, 1920, companies that ball mill stone in america ,Mill News. Vol. XXII, no. 16 (Oct. 14, 1920) By No Authorcrushing, screening, washing, grinding equipment in ,CGM Machinery manufactures a full line of crushing equipment for use in processing quarried stone, rocks, aggregate, raw mining minerals, recycled broken concrete.