Public domain
Production. Marine boilers. Hand hole plugs in marine boilers are carefully inspected at a large Midwest plant that has turned over all its facilities to the production of essential naval equipment
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineProduction. Marine boilers. Hand hole plugs in marine boilers are carefully inspected at a large Midwest plant that has turned over all its facilities to the production of essential naval equipment. 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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