英语词汇“gravel mine”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	gravel mine
释义	gravel mine gravel mine [′grav·əl ‚mīn] (mining engineering) A mine extracting gold from sand or gravel. Also known as placer mine.
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