USS Preston (DD-19)- Standard 2 1-2" Composition Valves for Pressures up to 100 Lbs - NARA - 117877252.jpg
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USS Preston (DD 19) Standard 2 1 2" Composition Valves for Pressures up to 100 Lbs NARA 117877252, 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): Standard 2 1/2" Composition Valves for Pressures up to 100 Lbs
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improper fraction