The rounded cams touch the rock, and the stem bar between them is where you clip in. The axle bolt is the circle where they all meet.
圆形的凸轮接触岩石，两个凸轮之间的柄就是手握的地方，轮轴螺丝连接凸轮和手柄。
Notice that the axle bolt is higher than where the cams touch the rock. This is what provides the (approximately) 4:1 mechanical advantage that keeps the CAM secure, even in a smooth, parallel crack.
请注意，中轴上的螺丝高于接触岩面的位置，正是这点提供了(大约)4：1的机械势能，即使是在光滑、平行的岩缝中，也保证了凸轮的安全性。
Remove the upper suspension arm nut and bolt at the axle bracket.
从车轴支架上拆去上端悬吊臂螺帽和螺栓。
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