英语词汇“placer mining”是什么意思，“placer mining”的读音、用法及例句翻译-烛光网

词汇	placer mining
释义	placer miningn.（名词） The obtaining of minerals from placers by washing or dredging.采砂矿：通过清洗或网捞从砂矿中获得矿物 Related Forms继承用法placer miner n.（名词）
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