back axle

• 后轴

back axle的用法和样例：

例句

1. The back axle of the bus was broken.
   公共汽车的后轴断了。
2. The rear axle is stationary, and is bolted rigidly to the main frame.
   后轴是固定的，用螺栓刚性固定在主机架上。