Public domain
Twenty-millimeter machine guns for planes. A big automobile plant, now entirely on war production, has a well-equipped department for the finishing of breeches for Air Corps machine guns. Milling, grinding and other machine operations are handled as expertly as in the days when the plant was making
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Credit lineTwenty-millimeter machine guns for planes. A big automobile plant, now entirely on war production, has a well-equipped department for the finishing of breeches for Air Corps machine guns. Milling, gri. 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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