单词：gray iron
gray iron的用法和样例：
例句
- The different types of austenite in gray iron present different behaviours during the breaking process of the material.灰铸铁中不同类型的奥氏体枝晶在材料断裂过程中具有不同行为。
- Globular microstructure of the semi-solid hypoeutectic gray iron was developed by the controlled casting.用控制铸造法获得了亚共晶半固态灰铸铁球状组织。
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实用英语