gray pig iron
常見例句
- In order to improve the properties of gray iron, the B containing pig iron is added to it instead of high priced ferroboron.
在灰鐵生產(chǎn)中加入含硼生鐵，代替價格較高的硼鐵合金等，以達到提高性能的目的。 - It was replaced by a gray lull, all smoke and pig iron.
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