Public domain
Production. Airplane propellers. Hamilton propeller blades for our warships of the air are placed into a Barnes multiple drill by Frank Krupczak at a Hartford, Connecticut, plant. This machine performs the precise boring operations required before fitting to spiders in sets of two or three
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Credit lineProduction. Airplane propellers. Hamilton propeller blades for our warships of the air are placed into a Barnes multiple drill by Frank Krupczak at a Hartford, Connecticut, plant. This machine perform. 1942-01-01. United States. Office Of War Information, Feininger, Andreas. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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