vacuum furnacing

例句：

1. 1. The vacuum furnace is used to producehigh-quality steel.
   真空炉用于生产高质量的钢材。
2. 2. The vacuum furnace is a crucial componentin the manufacturing process.
   真空炉是生产过程中的关键部件。
3. 3. The vacuum furnace is designed to maintaina low temperature environment during the heating process.
   真空炉设计用于在加热过程中保持低温环境。