A sling, locking carabiner, and petzl string (keeper) were used for the point of attachment to the top anchors.
用来与顶部挂片连接的是一根扁带，一把带锁的主锁，一个petzl胶套(keeper)。
A sling, locking carabiner, and petzl string (keeper) were used for the point of attachment to the top anchors.
用来与顶部挂片连接的是一根扁带，一把带锁的主锁，一个petzl胶套(keeper)。
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