在这里建筑师加建了一个对折的楼梯空间，它的形制介于长坡道和两跑楼梯之间；
Architect added a folded stairs in this area, located between the long ramp and paralleled stairs.
断面形状为沿对称轴对折的椭圆，此对称轴始终垂直于轴截面，其方向与平面图上的流道中线无关。
The shape of cross-section is an ellipse folded in half through one symmetry axis, and the axis keeps perpendicular with pinacoid-view.
用点线轮将纸样各线画在另一张纸或对折的纸面上，将对折样板打开或分离开，用铅笔或其它适当工具描画出点线痕迹。
With the line wheel pattern each line drawn on another piece of paper or folded paper, the folded model opened or separated with a pencil or other appropriate tools to draw line traces.
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