USS Preston (DD-19)- Rotor Guides for L.P. Turbine Casing - NARA - 117877627.jpg
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USS Preston (DD 19) Rotor Guides for L.P. Turbine Casing NARA 117877627, 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): Rotor Guides for L.P. Turbine Casing
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casing molding rotor helicopter rotor