USS Preston (DD-19)- 2 1-2" Two Way Valve (Oil Supply to Bearings) - NARA - 117877639.jpg
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USS Preston (DD 19) 2 1 2" Two Way Valve (Oil Supply to Bearings) NARA 117877639, 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): 2 1/2" Two Way Valve (Oil Supply to Bearings)
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improper fraction cat supply two-way