Impeller and diffuser are important parts in the Axial-flow pump and the later is the important part to take back energy.
叶轮和导叶是轴流泵装置中的重要过流部件，而轴流泵后导叶(以下简称导叶)是泵内动能回收的主要部件。
The impeller of the pump is designed to even number, and all impeller shafts are symmetrically distributed and installed back to back.
该型泵叶轮采用偶数设计方案，全部叶轮轴向成对称分布，背对背安装；
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