Public domain
Production. Making boilers. Great care is taken in producing steam boilers for the Army in a big Midwest plant. A defect detected by X-ray examination of the steel is chipped out by an air hammer
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Credit lineProduction. Making boilers. Great care is taken in producing steam boilers for the Army in a big Midwest plant. A defect detected by X-ray examination of the steel is chipped out by an air hammer. 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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