Public domain
Tank armor Production. Brake presses flatten each piece of tank armor plate after flame-cutting and before machining. Every plane must be perfectly flat to ensure a tight fit in the tank. Carnegie-Illinois Steel Corporation. Farrell, Pennsylvania
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineTank armor Production. Brake presses flatten each piece of tank armor plate after flame-cutting and before machining. Every plane must be perfectly flat to ensure a tight fit in the tank. Carnegie-Ill. 1941-01-01. United States. Office Of War Information, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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