tapped heater

例句：

1. 1.The engineer used a tapped heater to heat up the metal parts before assembling them.
   工程师使用点焊式加热器来加热金属部件，以便组装。
2. 2. The technician was tasked with repairing the tapped heater in the factory.
   技术员被指派维修工厂里的点焊式加热器。
3. 3. The company had invested in a new tapped heater system to improve efficiency.
   该公司投资了一个新的点焊式加热系统，以提高效率。