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Anaconda smelter, Montana. Anaconda Copper Mining Company. Batteries of Hardinge ballmills in which the ore is reduced to the fineness of flour for the flotation process which immediately follows
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Credit lineAnaconda smelter, Montana. Anaconda Copper Mining Company. Batteries of Hardinge ballmills in which the ore is reduced to the fineness of flour for the flotation process which immediately follows. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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