The structure body is of an Angle iron or a shelf bracket.
所述结构体是三角铁块也可以是三角支架。
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。
The cardinal shelf is composed of a backplate for dorsal palm and a bracket for wrist with a U-shaped rack fixed in front of it.
由掌背护板和腕托架构成主架，主架的前侧固定安装一U形前支架；
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