单词piton
n.: （登山用的）钢锥
网络: 铁钉；岩钉；岩石钉
（登山用的）钢锥，岩钉:
a short pointed piece of metal used in rock-climbing. The piton is fixed into the rock and has a rope attached to it through a ring at the other end.
【登山】冰用钢锥
复数：pitons
The first task was to remove the old piton in the dihedral, essentially a piece of trash.
第一个目标就是清除在岩角上的旧岩钉，那已经是个垃圾了。
Subjective danger you have some control over, such as screwing the ice piton in correctly so it holds you.
主观危险是您可以控制的危险，例如恰当地调节冰锥，以便它可以撑住您。