After the CAM lobe moves out from under the valve lifter, the valve spring forces the valve up onto its seat again.
当凸轮的凸角在凸轮挺杆下出现时，它推动凸轮挺杆向上运动(离开凸轮轴)。
After the CAM lobe moves out from under the valve lifter, the valve spring forces the valve up onto its seat again.
当凸轮的凸角在凸轮挺杆下出现时，它推动凸轮挺杆向上运动(离开凸轮轴)。
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