charge shaft

例句：

1. 1.The machine's charging shaft is worn out, which affects its performance.
   机器的充电轴磨损了，这影响了它的性能。
2. 2.The engineer carefully adjusted the charging shaft to ensure smooth operation.
   工程师仔细调整了充电轴，以确保顺利运行。
3. 3. The new design of the charging shaft greatly improved the efficiency of the device.
   新设计的充电轴大大提高了该设备的工作效率。