shoulder of spindle

例句：

1. 1. The machine is designed to operate smoothly, with a shoulder of spindle thatallows for easy adjustment.
   这台机器设计得可以顺畅运行，有一个纺纱机的肩部，方便调整。
2. 2. The shoulder ofspindle on the loom is wherethe threads are fed in and out.
   织布机上的纺纱机肩部是线进入和退出的地方。
3. 3. The shoulder ofspindle is crucial for maintaining the propertension in the yarn.
   纺纱机肩部对于保持纱线适当张力至关重要。