Public domain
Steel manufacture, Allegheny-Ludlum. Engineers must be alert at all times, to see that the bearings coupling the mill engines are kept oiled. Negligence might mean long delays in steel production. The engineer above is adjusting the valve of the oil line to increase the flow (note the huge fly-wheel
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineSteel manufacture, Allegheny-Ludlum. Engineers must be alert at all times, to see that the bearings coupling the mill engines are kept oiled. Negligence might mean long delays in steel production. The. 1940-01-01. United States. Office Of War Information, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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