USS Preston (DD-19)- 9" Balanced Expansion Joint for Main Steam Line - NARA - 117877374.jpg
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USS Preston (DD 19) 9" Balanced Expansion Joint for Main Steam Line NARA 117877374, 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): 9" Balanced Expansion Joint for Main Steam Line
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steam line joint resolution load line balanced