flash welder

例句：

1. 1. The flash welder is used to quickly join metal parts together.
   闪光焊机用于快速将金属部件连接在一起。
2. 2. The engineer used the flash welder to repair the damaged pipe.
   工程师使用闪光焊机修复了损坏的管道。
3. 3. The flash welder was used in the construction of the bridge, which required precise joints.
   闪光焊机在桥梁建设中使用，需要精确的接缝。