gray pig iron
常见例句
- In order to improve the properties of gray iron, the B containing pig iron is added to it instead of high priced ferroboron.
在灰铁生产中加入含硼生铁，代替价格较高的硼铁合金等，以达到提高性能的目的。 - It was replaced by a gray lull, all smoke and pig iron.
NEWYORKER: Something Like Happy 返回 gray pig iron