Using " evolved " techniques for crampons and tools .
使用冰爪和技术冰镐“发展后的”技术。
The most dangerous moment of his life-the moment after which , he said , he felt privileged to remain alive at all-saw him dangling on the 7000-foot vertical face of the north wall of the eiger , no crampons on his boots , with the surface continually melting in the sun and rocks cascading past him .
Jessica hollister will never forget the crunching noise of axes and crampons digging into the ice as she scaled a frozen waterfall alongside mount everest regular conrad anker .
