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

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。

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First of parts of Block Nut analysis;

首先是对螺母座进行零件分析；

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First of parts of Block Nut analysis;

首先是对螺母座进行零件分析；

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