double refined iron

例句：

1. 1.The double refined iron is used in the construction of bridges and buildings.
   双精炼铁用于桥梁和建筑的建设。
2. 2. The double refined iron is stronger and more durable than traditional steel.
   双精炼铁比传统钢材更坚固耐用。
3. 3.The double refined iron is a popular choice for industrial applications due to its superior mechanical properties.
   由于其优越的机械性能，双精炼铁是工业应用中受欢迎的选择。