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博物馆里展出的古铜镜是不是都是背面，为什么不展出正面呢？ - 知乎
source link: https://www.zhihu.com/question/23269464/answer/616178011
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正面其实无甚可看，古物青铜镜基本都已经锈蚀，处于文保的目的，一般并不进行再次打磨抛光，所以展出正面…
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