USS Preston (DD-19)- Standard 2 1-2" Cast Steel Valves for Press. From 101 to 300 Lbs. - NARA - 117877240.jpg
en
USS Preston (DD 19) Standard 2 1 2" Cast Steel Valves for Press. From 101 to 300 Lbs. NARA 117877240, 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" Cast Steel Valves for Press. From 101 to 300 Lbs.
commons
ja
プレストン(DD19)スタンダード2 1 2インチキャストスチールバルブをプレス用として使用。プレストン101～300Lbps。
commons_translated
improper fraction