point lever

例句：

1. 1. The point lever is used to adjust the tension in a rope.
   点杆用于调整绳子的张力。
2. 2.The engineer used the point lever to lift the heavy machine.
   工程师使用点杆来抬起沉重的机器。
3. 3. The point lever was used to balance the weight of the object.
   点杆被用来平衡物体的重量。