USS Preston (DD-19)- 6 x 8 x 8 x7 Combined Air & Circulating Pump, Sheet No. 3 - NARA - 117877523.jpg
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USS Preston (DD 19) 6 x 8 x 8 x7 Combined Air & Circulating Pump, Sheet No. 3 NARA 117877523, 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): 6 x 8 x 8 x7 Combined Air & Circulating Pump, Sheet No. 3
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circulating circulate air pump