基于平行四边形环链的旋转开合板式结构
俞锋(),许贤,罗尧治*()
Rotary retractable plate structures with parallelogram closed-loop chains
Feng YU(),Xian XU,Yao-zhi LUO*()

图 7. 调整前旋转开合板式结构

Fig.7. RRPS before adjustment