placer mining
短語(yǔ)詞組
- gold placer -mining 採(cǎi)金場(chǎng)
- placer gold mining 砂金鑛開(kāi)採(cǎi)
- placer r mining 砂鑛淘採(cǎi)
- beach placer mining industry 海濱砂鑛開(kāi)採(cǎi)業(yè)
- beach placer mining 海濱砂鑛開(kāi)採(cǎi)
- method of littoral placer mining 濱海砂鑛開(kāi)採(cǎi)法
- hydraulic mining of placer 砂鑛露天水力開(kāi)採(cǎi) 返回 placer mining