... 容积泵：对比一下电子元件配件。Positive-displacement pump 叶片泵：Impeller-type pump 容积式液压马达：Hydraulic do thingsuator ...
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impeller type pump 动叶轮泵
bronze roller type impeller pump 青铜辊筒式推进泵
open impeller type sand pump 开式叶轮泥浆泵
doubleshrouded impeller type sand-pump 闭式叶轮泥浆泵
closed impeller type sand pump 闭式叶轮泥浆泵
pump-type impeller aerator 泵型叶轮表面曝气机
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