spot welder

例句：

1. 1. The spot welder was used to attach metal parts together quickly and efficiently.
   点焊机被用来快速而有效地将金属部件连接在一起。
2. 2. The technicians were using a spot welder to repair the damaged part of the equipment.
   技术人员正在使用点焊机修理设备的损坏部分。
3. 3. The spot welder is a crucial tool in the manufacturing process, as it ensures the integrity of the joints.
   点焊机是生产过程中至关重要的工具，因为它确保了接头的完整性。