Extras for experts: Brace your hands against the back of a sofa and bend over at a 90-degree Angle.
专家支招：双手撑着沙发背，身体呈90度角弯曲。
2
Based on traditional bracing system of wind tunnel testing, a system of hanging brace of large Angle of attack was designed, which can reduce frame interference.
基于传统的风洞试验支撑系统，设计了能减小支架干扰的大攻角张线式支撑系统。
3
Spatial Anglebrace is a kind of brace that the movement direction of supporting end is different from the direction of major elastic axis.