recuperator furnace

例句：

1. 1. The recuperator furnace is used to heat up the metal parts after they have been machined.
   回火炉用于在金属部件加工后加热。
2. 2.The engineers used the recuperator furnace to repair the damaged parts of the machine.
   工程师们使用回火炉修复了机器的损坏部分。
3. 3. The recuperator furnace is an essential tool for maintaining the temperature and quality of the metal parts.
   回火炉是保持金属部件温度和质量的关键工具。