The gas, water, and other impurities (known as basic sediment and water) must be removed before selling the oil. This separation process is called oil treating.
在原油销售前，气体、水和其它杂质必须脱除(水和其它杂质统称底部沉积物和水)，这种分离过程称为原油处理。
Those will provide basic theory for study regulation of water and sediment movement.
为今后研究河流水沙运动规律提供了理论依据。
Those will provide basic theory for study regulation of water and sediment movement.
为今后研究河流水沙运动规律提供了理论依据。
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