tapered-tooth spindle

例句：

1. 1.The tool is made of a tapered tooth spindle, which helps to drill through hard materials.
   这个工具是由锥形牙轴制成的，有助于钻透硬质材料。
2. 2.The machine uses a tapered tooth spindle to rotate the drill bit at high speeds.
   这台机器使用锥形牙轴以高速旋转钻头。
3. 3.The engineer designed the tool with a tapered tooth spindle to improve its efficiency and reduce wear.
   工程师设计了带有锥形牙轴的工具，以提高其效率并减少磨损。