fire iron

例句：

1. 1. The fireiron is used to melt metals.
   火炉铁用于熔化金属。
2. 2. Thefurnace iron was the keyto success in the industry.
   火炉铁是该行业成功的关键。
3. 3.The furnace iron is essential for making steel.
   火炉铁是制造钢铁所必需的。