英语词汇“reciprocal defence”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	reciprocal defence
释义	reciprocal defence (US reciprocal defense) Fortification noun A type of flanking defence found in permanent fortifications. Origin Mid 18th century.
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reciprocal defence