Public domain
Conversion. Copper and brass processing. In the brass and copper casting shop, the operator of an electric furnace is pouring the molten metal into molds to form shells, or rough tubes, which are later formed into finished tubes. Tubes are formed by casting molten metal into these molds in which a r
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Credit lineConversion. Copper and brass processing. In the brass and copper casting shop, the operator of an electric furnace is pouring the molten metal into molds to form shells, or rough tubes, which are late. 1942-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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