high-duty malleable cast iron
... 高强度金属合金 high-strength metallic alloy; 高强度可锻铸铁 high-duty malleable cast iron; 高强度可焊铝合金 high-strength weldable aluminum alloy; ...
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主体材料采用高强度可锻铸铁，热镀锌防锈。
It's action is insulation protection. The body made of high-intensity malleable iron, hot-dip galvanized.
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