alluvial mining

常見例句

雙語例句

• Placer mining: Oldest method of recovering gold from alluvial deposits.
  砂鑛 古河牀裡的金砂鑛牀。
• Mechanized placer mining, with special devices for washing and separating waste from valuable minerals, is used in productive alluvial deposits.
  機械化砂鑛開採用於含鑛量豐富的砂鑛牀．利用專門設備來淘洗、分離廢物與有用鑛物。
• Gravel cemented geological body, called solid formation, has been found in the fluvial sediment of Quaternary system in the exploration and mining of alluvial gold deposit in recent years.
  近年來在砂金鑛牀的勘探和開採中，發(fā)現(xiàn)在第四系河流沖積物中存在砂礫石膠結地質躰，被稱爲膠結層。

原聲例句

• He is one of many who have flocked to the Kangari hills in southern Sierra Leone to find small fortunes in the hard graft of alluvial gold mining.

權威例句

• De Beers is active in every category of industrial diamond mining: open-pit, underground, large-scale alluvial, coastal and deep sea.
  FORBES: Anglo American Receives Final Regulatory Approval for De Beers Acquisition
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