Public domain
Three-inch A.A. cartridge cases. Between the drawing operations which process an antiaircraft cartridge case from a flat metal disc, the partly-finished cases are washed and annealed. When they move on to the next drawing operation, the surfaces are free of scale and other adhesions and the metal is
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Credit lineThree-inch A.A. cartridge cases. Between the drawing operations which process an antiaircraft cartridge case from a flat metal disc, the partly-finished cases are washed and annealed. When they move o. 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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