The downward-moving side of the rocker arm pushes on the valve stem to open the valve.
The downward-moving side of the rocker arm pushes on the valve stem to open the valve.
摇臂向下移动的那一边推动气门杆以打开气门。
The downward-moving side of the rocker arm pushes on the valve stem to open the valve.
摇臂向下移动的那一边推动气门杆以打开气门。