main wheel

• 发条轮,原动轮,主轮

main wheel的用法和样例：

例句

1. If the plane is landing and one wheel touches down first, the plane has a tendency to veer off in the direction of that wheel.
   如果着陆时起落架只有一只主轮前触地，这时，飞机有向此轮子一边转弯倾向。