capstan nut

例句：

1. 1. The capstan nut is a crucial component in the machine's operation.
   卡普斯坦螺母是机器运行的关键部件。
2. 2. The engineer carefully removed the capstan nut to inspect its condition.
   工程师小心翼翼地取下卡普斯坦螺母以检查其状况。
3. 3. The capstan nut was designed to ensure smooth rotation of the gears.
   卡普斯坦螺母的设计是为了确保齿轮的平滑旋转。