spindle gearing

例句：

1. 1.The machine's spindle gearing is worn out, causing it to be difficult to turn.
   这台机器的主轴齿轮磨损严重，转动起来很困难。
2. 2. The new design uses a more efficient spindle gearing system.
   新设计采用了更高效的主轴齿轮系统。
3. 3.The engineer carefully adjusted the spindle gearing to ensure smooth operation.
   工程师仔细调整了主轴齿轮以确保运转顺畅。