alluvial mining
常见例句
- Placer mining: Oldest method of recovering gold from alluvial deposits.
砂矿 古河床里的金砂矿床。 - Mechanized placer mining, with special devices for washing and separating waste from valuable minerals, is used in productive alluvial deposits.
机械化砂矿开采用于含矿量丰富的砂矿床.利用专门设备来淘洗、分离废物与有用矿物。 - 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.
近年来在砂金矿床的勘探和开采中,发现在第四系河流冲积物中存在砂砾石胶结地质体,被称为胶结层。 - 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.
- 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 返回 alluvial mining