Like the cylinder block, the head is made from either cast iron or aluminum alloy.
像气缸体一样，气缸盖是由铸铁或者铝合金制成。
Cast away some block tin for lighten!
抛去一些锡减轻重量！
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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