spot welding point

例句：

1. 1. The engineer used a specialtool to spot weld the metal together.
   工程师使用特殊工具将金属焊接在一起。
2. 2. Theconstruction crew was working on the seamof the bridge, fixing any weak spots.
   建筑工人正在桥的接缝处工作，修复任何弱点。
3. 3. The carpenter carefully marked thespot welding points beforestarting the assembly process.
   木匠在开始组装过程之前仔细标记了焊接点。