Fractional distillation of petroleum is carried on in a still. 石油的分餾在蒸餾器內進(jìn)行。
Today, the retorts and pot stills have been largely supplanted by more efficient distillation methods in most industrial processes. 如今，在許多工業(yè)過(guò)程中，絕大部分曲頸瓶和罐式蒸餾器已被效率更高的蒸餾方法代替。
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