automatic submerged slag welding of rail

例句：

1. 1.The new machine is very efficient and canbe operated automatically.
   这台新机器非常高效，可以自动操作。
2. 2. Therobot has a built-in sensor that allows it tooperate automatically without human intervention.
   这个机器人内置了传感器，可以自动运行而不需要人工干预。
3. 3. The automatic system can detectand respond to potential hazards in real-time.
   这个自动系统能够实时检测和响应潜在的危险。