welding furnace

例句：

1. 1. The welding furnace is used to heat upthe metal parts for joining.
   焊接炉用于加热金属部件以进行焊接。
2. 2. The engineercarefully inspected the welding furnacebefore starting the work.
   工程师在开始工作前仔细检查了焊接炉。
3. 3. The welding furnace was designed to ensure ahigh-quality welding process.
   焊接炉被设计用来确保高质量的焊接过程。