USS Henley (DD-39)- 1 1-2" Cylinder Relief Valve U. S. Government Pattern - NARA - 76032797.jpg
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USS Henley (DD 39) 1 1 2" Cylinder Relief Valve U. S. Government Pattern NARA 76032797, 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): 1 1/2" Cylinder Relief Valve U. S. Government Pattern
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