A rod moved by a cam to operate the valves in an internal-combustion engine.
A rod moved by a cam to operate the valves in an internal-combustion engine.
阀门挺杆通过凸轮转动的杆，用来操纵内燃机的阀门
A rod moved by a cam to operate the valves in an internal-combustion engine.
阀门挺杆通过凸轮转动的杆，用来操纵内燃机的阀门