For this, it is indicated that it is practical to analyze impeller vibrating using composition unit method.
据此，指出了采用组合单元法分析叶轮振动是切实可行的好方法。
The power-saving accumulator is a mechanical power-saving unit with a flywheel, steel balls, a impeller and a pulley.
节能蓄能器是一种机械节能装置，由飞轮、钢球、叶轮和蓄能器胶带轮组成。
Pumps are horizontally mounted: single stage, end suction, back pull-out, ROTOKEY impeller mounting, simplified heavy-duty bearing unit etc.
该泵采用水平安装，单级、端吸、后拉式，ROTOKEY叶轮，简化了重载轴承部件等优点。
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