... pump with opposed impellers 背靠背叶轮泵 ; 相对叶轮泵 ; 背 ; 违靠违叶轮泵 Trimming of Impellers 叶轮的修整 ump with enclosed impellers 闭式叶轮泵 ...
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代替泵叶轮应该经过修整，或者阀门应该位于系统部分节流的地方。
Instead the pump impeller should be trimmed or valves located else where in the system to partially throttle the flow.
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