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HMS ''M4'' was an M-class submarine of the Royal Navy built by Armstrong Whitworth, Newcastle Upon Tyne, and laid down in 1917. ''M4'' was cancelled and sold as an incomplete hulk on 30 November 1921. == References == * * 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「HMS M4」の詳細全文を読む スポンサード リンク
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