hollow axle

• 空心轴

hollow axle的用法和样例：

例句

1. Driving power for the cutting tool comes from the rotation of the spindle, which is a hollow shaft that rotates in bearings.
   刀具的驱动力来自主轴的旋转，主轴则是一根在轴承中旋转的空心轴。
2. Make sure to cut pipe keeping the cut plane perpendicular to the axle.
   切割管子时要使面与管轴保持垂直。