Public domain
Steel manufacture, Allegheny-Ludlum. This quality steel tubing and piping will eventually be used to convey, refine or distill elements used in defense production. Expensive alloy steels are used, particularly for chemical piping. Special alloys have been devised to resist specific chemicals
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Credit lineSteel manufacture, Allegheny-Ludlum. This quality steel tubing and piping will eventually be used to convey, refine or distill elements used in defense production. Expensive alloy steels are used, par. 1940-01-01. 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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