roll-spot welding

例句：

1. 1. The engineers used a roll-spot welding machine to join the metal plates together.
   工程师们使用滚焊机将金属板连接在一起。
2. 2.Roll-spot welding is an effective way to reinforce weak areas in a structure.
   滚焊是一种加固结构中薄弱区域的有效方法。
3. 3. The construction crew was able to complete the project on time by using roll-spot welding techniques.
   施工团队通过使用滚焊技术，按时完成了项目。