USS Henley (DD-39)- Cylinder and Cylinder Cover for 8" X 8" Circulating Engine - NARA - 75842170.jpg
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USS Henley (DD 39) Cylinder and Cylinder Cover for 8" X 8" Circulating Engine NARA 75842170, USS Henley (DD-39), US National Archives series: Alphabetical Series of Ship Engineering Drawings, Images from the National Archives and Records Administration, US National Archives location: other, USS Henley (DD-39): Cylinder and Cylinder Cover for 8" X 8" Circulating Engine
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circulating circulate element of a cylinder