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coinage metals

查词链接:https://www.dute.org/dict/coinage_metals复制链接
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abstract:
The coinage metals comprise, at minimum, those metallic chemical elements which have historically been used as components in alloys used to mint coins. The term is not perfectly defined, however, since a number of metals have been used to make "demonstration coins" which have never been used to make monetized coins for any nation-state, but could be.

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