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。
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.
一种线性的底部下凹的洼地，水和沉积物可以从中流过，沉积物可沉积在其中呈有特点的、往往是纵长的沉积体。
A linear, commonly concave-based depression through which water and sediment flow and into which sediment can be deposited in distinctive, often elongated bodies.
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