rocker-arm push-rod

例句：

1. 1.The rocker-arm push-rod is used to adjust the angle of the camera lens.
   摇臂推杆用于调整相机镜头的角度。
2. 2. The engineer tested the rocker-arm push-rod and found it to be reliable.
   工程师测试了摇臂推杆，并发现它很可靠。
3. 3.The rocker-arm push-rod was designed to simplify the process of adjusting the camera settings.
   摇臂推杆的设计是为了简化调整相机设置的过程。