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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

Steel manufacture, Allegheny-Ludlum. This quality steel tubing and pip...

Public domain photograph of 1930s-1940s industrial development, no copyright restrictions image - Picryl description