lever shaft plug

例句：

1. 1.The engineer used a lever shaft plug to adjust the gears.
   工程师使用杠杆轴封头来调整齿轮。
2. 2.The tool was designed to fit securely into the lever shaft plug.
   该工具被设计成可以牢固地插入到杠杆轴封头中。
3. 3. The lever shaft plug is essential for maintaining the smooth operation of the machinery.
   杠杆轴封头对于保持机械设备的平稳运行至关重要。