USS Preston (DD-19)- 1 1-2" and 6" Relief Valves in Engine Room - NARA - 117877491.jpg
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USS Preston (DD 19) 1 1 2" and 6" Relief Valves in Engine Room NARA 117877491, USS Preston (DD-19), US National Archives series: Alphabetical Series of Ship Engineering Drawings, Images from the National Archives and Records Administration, US National Archives location: other, USS Preston (DD-19): 1 1/2" and 6" Relief Valves in Engine Room
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