axles造句

He had to repair the wagon, grease the axles.
他得去修理大车, 给车轴涂油.

The springs are placed between the frame and the wheel axles.
弹性元件装在车架和车桥之间.

An increasing number of train designs incorporate hollow axles.
火车空心轴一体化的数量逐渐递增.