iron-and-steel furnace

例句：

1. 1. The iron-and-steel furnace is the heart of our steel production line.
   铁水炉是我们钢铁生产线的核心。
2. 2. The blast furnace is used to produce pig iron from raw ore.
   高炉用于从矿石中生产生铁。
3. 3. The converter furnace is used to refine iron and steel scraps.
   转炉用于精炼废钢铁。