Public domain
Conversion. Beverage containers to aviation oxygen cylinders. After they are stamped on the huge toggle press in the metal division of a large rubber factory, these cylindrical domes which make up half of a shatterproof oxygen cylinder, are placed on a large conveyor where they are carried to workme
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Credit lineConversion. Beverage containers to aviation oxygen cylinders. After they are stamped on the huge toggle press in the metal division of a large rubber factory, these cylindrical domes which make up hal. 1942-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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