higher specific speed pump 高比转速泵

low specific speed pump 低比转速泵

high specific speed pump 高比速泵

low specific speed pump coupling 低比转速泵联轴器

higher specific speed pump coupling 高比转速泵联轴器

medium specific speed pump coupling 中比转速泵联轴器

high-specific speed pump 高比转速泵

specific speed of pump 水泵比转速

pump specific speed 水泵比速 ; 泵比转数

low specific speed drainage pump 低比速疏水泵