tapering spindle

例句：

1. 1. The tapering spindle gradually reduced the diameter of the wood.
   纺锤逐渐减小木材的直径。
2. 2. The narrowing of the spindle made it easier to turn the tool.
   纺锤的变窄使得转动工具变得更容易。
3. 3.As the spindle tapered, the weight of the tool increased.
   随着纺锤逐渐变细，工具的重量增加了。