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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Roundel (fortification) ： ウィキペディア英語版 Roundel (fortification) The roundel is a strong artillery fortification with a rounded or circular plan of a similar height to the adjacent defensive walls. If the fortification is clearly higher than the walls it is called a battery tower. == Design == The design of a roundel, which was massive in comparison with a normal defensive tower, enabled the deployment of heavy cannon. Roundels were built of both earth and brickwork; in the latter case, vaulted rooms (casemates) were built on the inside. 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「Roundel (fortification)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.