英语词汇“mint proofing piece”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	mint proofing piece
释义	Mint Proofing Piece Mint Proofing Piece A high-quality gold ingot. Mint proofing pieces are melted in mints with less high-quality gold to make an alloy of 90% pure gold. This gold is then minted into coins. It is also called simply a proofing piece.
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Mint Proofing Piece