dead-melted steel

例句：

1. 1. The old factory has been renovated into a modern office building, leaving only the dead-melted steel from its old machines behind.
   旧工厂已经被翻新成了一座现代化的办公楼，只留下了那些老机器留下的死铁。
2. 2. The construction crew used the dead-melted steel to create a new playground for the children.
   建筑队用这些死铁制作了一个新的儿童游乐场。
3. 3. The company was forced to scrap the dead-melted steel in their production line due to environmental regulations.
   由于环保法规，公司被迫废弃生产线上的死铁。