ACD (Active Camming Device) - Protection device that secures in rock cracks or pockets by means of spring-loaded cams. See SLCD.

使用弹簧凸轮装置在岩石裂缝或者岩洞做确材。

SLCD (Spring-loaded camming device) -A piece of active climbing protection composed of a number of cams on a stem with a trigger bar.

一种主动材，由绳缆串联一定数量凸轮组成，绳缆有引动棒控制。