Public domain
Huge drop hammers work day and night forming sheet metal parts for United Nations bombers and fighters at the North American Aviation, Inc., plant, Inglewood, Calif. The heavy hemp rope is used to snub the hammer so that it forms the part under proper pressure and rises clear of the work after each
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Credit lineHuge drop hammers work day and night forming sheet metal parts for United Nations bombers and fighters at the North American Aviation, Inc., plant, Inglewood, Calif. The heavy hemp rope is used to snu. 1939-01-01. Palmer, Alfred T.. FSA/OWI Color Photographs, Library of Congress. Public domain.
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