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1 definition found

From: MDBG CC-CEDICT Chinese-English Dictionary 漢英字典

 銅牆鐵壁 [ㄊㄨㄥˊ ㄑㄧㄤˊ ㄊㄧㄝˇ ㄅㄧˋ; tong2 qiang2 tie3 bi4]
 copper wall, iron bastion (idiom); impenetrable defense