The ratchet pawl is arranged on the spacing sliding block with a ratchet pawl pin. The spacing sliding block can move in the horizontal chute.

棘爪用棘爪销子安装在限位滑块上，限位滑块可在水平滑槽中运动。

youdao

We hung a backpack off of an ice screw to block some of the debris funneling down the chute, but mostly all I could do was hold the rope and cower while Jim led up.

WSJ: Amid the Perils of Patagonia