First, the water pump mechanical seal ring on the surface of metal corrosion.
第一，水泵的机械密封上金属环表面均匀腐蚀。
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。
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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