Since the steam engine was fired by coal, the large mills did not need to be located by rivers, as had mills that used water-driven machines.
由于蒸汽机是靠燃煤来驱动的，因此一些大型棉纺织厂就不再像那些使用水力驱动机器的工厂一样，必须依河而建。
Because volcanoes are gas-driven machines. An eruption is often preceded by an increase in discharged gas and by variations in its chemical composition.
因为火山就相当于一台气体驱动的机器，排放气体量的增加和气体化学成分的改变通常是喷发的前奏。
Description: Specialized in manufacturing various hand-operating and motor-driven machines for plant-protecting, cleaning and gardening. Based in China.
研究、制造各类手动、机动植保机械、清洗机械、园艺机械。主导产品高压清洗机、动力喷雾机。
Description: Specialized in manufacturing various hand-operating and motor-driven machines for plant-protecting, cleaning and gardening. Based in China.
研究、制造各类手动、机动植保机械、清洗机械、园艺机械。主导产品高压清洗机、动力喷雾机。
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