Geometry analysis and design procedure of complex pantograph structures are studied with joint coordinates as variables and parabolic shell is taken as an example.
以抛物面壳为例，介绍了用节点坐标为未知量分析复杂剪式铰结构几何问题的方法和几何设计的步骤。
2
Analytical method is raised to calculate the distortion on the end of seal ring by application of the theory of moment force of shell and the relevant calculation procedure is prepared.
提出了应用壳体力矩理论求解密封环端面力变形的解析解的方法，并编制了相应的计算程序。
3
The system calls a WH_SHELL hook procedure when the shell application is about to be activated and when a top-level window is created or destroyed.