spray welding unit

例句：

1. 1. The spray welding unit is used to quickly repair small cracks in metal surfaces.
   喷涂焊接单元用于快速修复金属表面的小裂缝。
2. 2. The engineer used the spray welding unit to join two pieces of metal together.
   工程师使用喷涂焊接单元将两块金属连接在一起。
3. 3.The spray welding unit was designed to be easy to use and maintain.
   喷涂焊接单元设计为易于使用和维护。