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.
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.
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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