Public domain
Production. Marine boilers. A flange is turned on a large cone that is part of heat transfer equipment being made for the Army in a big Midwest plant
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Credit lineProduction. Marine boilers. A flange is turned on a large cone that is part of heat transfer equipment being made for the Army in a big Midwest plant. 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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