短語(yǔ)詞組短語(yǔ)alluvial l gold 砂金;沖積砂金alluvial type gold placer 沖積砂金礦床alluvial gold deposit 沙金礦ALLUVIAL GOLD DUST 金粉alluvial gold production 砂金生產(chǎn)alluvial gold mine 砂金礦山washing of alluvial gold 砂金洗選separation of alluvial gold 砂金分選alluvial gold mining 砂金礦開(kāi)采 返回 alluvial gold