Besides white cast iron was often add promoting chilling turn elements, such asp.

除此之外白口铸铁还常常添加促进白口化的元素，例如磷等。

youdao

Besides white cast iron was often add promoting chilling turn elements, such asp.

除此之外白口铸铁还常常添加促进白口化的元素，例如磷等。

youdao