safety brake

• 安全制动器,保险闸

safety brake的用法和样例：

例句

1. Originally it was the safety valve for a hydraulic plant.
   它最早是一家水电厂的安全闸阀。
2. The safety gates at the railroad crossing are lowering.
   铁路交叉路口的安全闸正在放下来。
3. Originally it was the safety valve for a hydraulic plant.
   它最早是一家水电厂的安全闸阀。
4. The safety gates at the railroad crossing are lowering.
   铁路交叉路口的安全闸正在放下来。