Climbing 【登山】
- a clamp that is attached to a fixed rope and automatically tightens when weight is applied and relaxes when it is removed鸠玛尔式上升器（一种拴在登山索上的夹具, 施加重量时自动收紧, 重量移开时自动松开）。
jumared, jumaring
no obj. climb with the aid of such a clamp用鸠玛尔式上升器攀登。
词源
1960s: originally in Swiss use, of unknown origin.