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jumar jumar
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[Climbing] [登山]
◙ noun
1. 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（一种配在登山索上的夹具，施加重量时会自动收紧，重量移开时会自动松开）
◙ (jumared, jumaring)
1. [no obj.] climb with the aid of such a clamp
• 用鸠玛尔式上升器攀登1. 1960s: originally in Swiss use, of unknown origin

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