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{| SM U-57 was one of the 329 submarines serving in the Imperial German Navy in World War I. ''U-57'' was engaged in naval warfare and took part in the First Battle of the Atlantic. ==Summary of raiding career== 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「SM U-57」の詳細全文を読む スポンサード リンク
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