gray cast-iron brake shoe

例句：

1. 1. The car's brake system is in need of maintenance.
   汽车的刹车系统需要维护。
2. 2. The old car's brake shoes were worn out, and they needed to be replaced.
   旧车的刹车蹄片磨损了，需要更换。
3. 3. The mechanic inspected the brake system and found that the brake shoes were in good condition.
   机械师检查了刹车系统，发现刹车蹄片状况良好。