brake beam bottom rod

例句：

1. 1.The brake beam is responsible for slowing the car down.
   刹车杆负责使汽车减速。
2. 2.The brake beam was damaged during the accident.
   刹车杆在事故中受损。
3. 3. The engineer inspected the brake beam to ensure it was functioning properly.
   工程师检查了刹车杆以确保其正常工作。