抛物面一种有与单坐标轴平行的抛物截面和与该轴垂直的椭圆截面的平面。

A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.

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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。

Geometry analysis and design procedure of complex pantograph structures are studied with joint coordinates as variables and parabolic shell is taken as an example.

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