Public domain
Production. Airplane manufacture, general. This stretching machine in the hydraulic press department of North American Aviation, Incorporated at Inglewood, California, forms sheet metal parts by stretching metal over a die. The sheet is stretched almost to its elastic limit so it will retain its for
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineProduction. Airplane manufacture, general. This stretching machine in the hydraulic press department of North American Aviation, Incorporated at Inglewood, California, forms sheet metal parts by stret. 1942-01-01. Palmer, Alfred T., United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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