Public domain
Conversion. Copper and brass processing. This picture shows brass rod coming from the extrusion machine. Red hot brass billets (solid cylindrical castings) are pushed by tremendous force through a steel die in the extrusion press to form rods of various shapes, or hollow shells that are subsequently
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineConversion. Copper and brass processing. This picture shows brass rod coming from the extrusion machine. Red hot brass billets (solid cylindrical castings) are pushed by tremendous force through a ste. 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.