Ductile iron bail的用法和样例：
例句
- The non-equilibrium crystallizing processes and the characteristics of the metal mould nodular iron grinding ball have been discussed in this paper.
摘要用彩色金相法分析研究了金属型球铁磨球非平衡凝固过程和特性。 - The process to produce manganese-nodular-iron balls with phosphoricping iron, its features and economic profit are introduced.
介绍了利用高磷生铁制取中锰球铁磨球的工艺过程和特点及显著的经济效益。
