drum cam

• 凸轮轴

drum cam的用法和样例：

例句

1. The camshaft has a cam, on which there is a lob, or bump.
   凸轮轴上有一个凸轮，凸轮上有一个凸角。
2. As the camshaft rotates, the lobe, or high spot of the cam, pushes against parts connected to the stem of the valve.
   当凸轮轴旋转时，凸轮凸起的或者高点的位置，推动气门座。