carabiner

剑桥词典

an object used for attaching two things, for example by a climber for attaching a rope to a belt . It is oval or like a letter D in shape , with a part that opens and closes .
连接两件物体的扣（如登山扣）
I unclipped my carabiner from the rope . 我从绳索上松开了登山扣。 返回 carabiner