蜗壳、泵座、电机座、叶轮螺母是生铁铸造、耐腐化性较好，加工工艺方便。

Volute, Pump, Block, Block motor, impeller nut is cast iron, good corrosion resistance, easy processing.

youdao

蜗壳、泵座、电机座、叶轮螺母是生铁铸造、耐腐化性较好，加工工艺方便。

Volute, Pump, Block, Block motor, impeller nut is cast iron, good corrosion resistance, easy processing.

youdao