preheat lamp

例句：

1. 1. The preheat lamp wasused to warm up the room before westarted working.
   预热灯在开始工作前用来加热房间。
2. 2. The preheat lamp was usedto heat up the metal parts before theywere machined.
   预热灯用于加热金属部件，以便进行机械加工。
3. 3. The preheatlamp was used to prevent the workpiecefrom being damaged during the machiningprocess.
   预热灯用于在加工过程中防止工件受损。