General view of workers testing the features of new hydraulic systems at the Naval Air Material Center's Aeronautical Materials Laboratory. Two workers are seen turning valves on the machinery while a third worker looks on.
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United States. Navy, and Naval Air Material Center. “Testing of New Developments in Hydraulic Systems,” 1958. Photographs from the Papers of J. Hartley Bowen, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/p2676v56g.
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