automatic train stopping device

例句：

1. 1. This automatic train stopping device can automatically stop the train when it encounters anobstacle.
   这个自动列车停驶装置可以在遇到障碍物时自动停止列车。
2. 2.The safety of the passengers is ensured by this automatic train stopping device.
   乘客的安全由这个自动列车停驶装置保障。
3. 3.The automatic train stopping device has greatly improved the efficiency of the railway transportation system.
   自动列车停驶装置大大提高了铁路运输系统的效率。