Recent years,the safety of high scaffold has become the focus of construction site,and one of the most important problems is the geometrical stability.
近年来高型脚手架的安全成为建筑工地使用的焦点,其中最重要的一个问题就是脚手架的几何不变条件。
Probing into the bearing capacity of П shape scaffold;
П型脚手架承载力的探讨