die steel

例句：

1. 1. The construction site is surrounded by a large area of die steel.
   施工现场周围是一片大片的死钢铁。
2. 2. The new bridge was built using the latest die steel technology.
   这座新桥使用了最新的死钢铁技术建造而成。
3. 3. The old factory has been replaced by a modern building made from high-quality die steel.
   旧工厂已经被一座现代化的建筑所取代，这座建筑是用高质量的死钢铁建造的。