?蜗旋凸轮

... 粗磨 snag 蜗旋凸轮 snail cam 蛇行运动 snake motion ...

?蜗形调整凸轮

snail cam 蜗形调整凸轮 I can't bear him; he does everything at a snail's pace. 我真受不了他，他做什么事都磨磨蹭蹭。