axial wire bead

例句：

1. 1. The axle bead on the bicycle is worn out.
   自行车的轴珠磨损了。
2. 2. The axle bead on the car is loose.
   汽车的轴珠松动了。
3. 3. The axle bead on the machine is broken.
   机器的轴珠断了。