USS Preston (DD-19)- 3" and 4 1-2" Standard Angle Stop, Check, Lift Valves - NARA - 117877501.jpg
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USS Preston (DD 19) 3" and 4 1 2" Standard Angle Stop, Check, Lift Valves NARA 117877501, 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): 3" and 4 1/2" Standard Angle Stop, Check, Lift Valves
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angle-park check mark