When scaffold work, the adjustable shelf and the bracket fixing use to attach the wall bolt and the wall anchor, two between not relative motions.
当脚手架工作时，活动架和固定架均用附墙螺栓与墙体锚固，两架之间无相对运动。
2
Attach the wall alternately through the adjustable shelf and the bracket fixing, rises and falls mutually, scaffold then along wall on reservation hole cascade fluctuation.