Public domain
Conversion. Beverage containers to aviation oxygen cylinders. Four major welding operations are essential to the manufacture of shatterproof oxygen cylinders for high altitude flying. In the first, the circumferential straps are securely welded to the cylindrical portion to prevent tearing of the me
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineConversion. Beverage containers to aviation oxygen cylinders. Four major welding operations are essential to the manufacture of shatterproof oxygen cylinders for high altitude flying. In the first, th. 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.