oil-pressure adjusting screw
Adjusting screw
调节螺旋
调整螺栓
调节螺丝
蝶螺丝
调整螺
可调整螺钉
调整螺钉
蝶螺钉
调整螺旋
校正螺旋
调整螺钉松紧螺旋扣
第螺钉
压下螺丝
调校螺丝
valve clearance adjusting screw
engine valve lash adjustment
valve lash clearance adjustment
valve lash adjustment interval
insufficient valve lash