Public domain
Shipbuilding. "Liberty" ships. Welding is one of the most important advances in shipbuilding during the present century, with the resulting in immense savings in time, material and weight in the building of ships. This welder is joining side plates to angle frames forming sections of the propeller s
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineShipbuilding. "Liberty" ships. Welding is one of the most important advances in shipbuilding during the present century, with the resulting in immense savings in time, material and weight in the build. 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.