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。

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.

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接触到岩面后，将脚部放松，以便吸收重量。

As you make contact, relax your foot, allowing it to absorb weight.

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环绕岩体，在内—外接触带中形成许多不同类型的稀有，有色金属矿床。

There are lots of different rare-nonferrous metallic deposits around the inner and outer contact zones.

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