flax brake

例句：

1. 1. The car's engine isrunning smoothly with the new line brake installed.
   新安装的线刹车使汽车发动机运行顺畅。
2. 2. The line brake was a criticalcomponent of the old train system.
   线刹车是旧铁路系统的一个关键部件。
3. 3. Theengineer had to replace the line brake dueto wear and tear.
   由于磨损，工程师不得不更换线刹车。