Public domain
Conversion. Copper and brass processing. This worker is at the controls of an extruding machine, a powerful piece of apparatus in a brass and copper mill that pushes billets of metal usually heated red hot, through a die to form rods, tubes, angles, channels and other shapes. Chase Brass and Copper
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Credit lineConversion. Copper and brass processing. This worker is at the controls of an extruding machine, a powerful piece of apparatus in a brass and copper mill that pushes billets of metal usually heated re. 1942-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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