双曲面

The twin curved glass incised with an abstract pattern stabilizes three spaces: one internal, one external and one interspatial.

上有抽象图案的曲玻璃使三个空间（内部空间，外部空间和层际空间）稳固下来。

This article not only discusses the ruled surface features of uniparted hyperboloid and its application in archtecture engineering but also discusses the teaching of the ruled surface.

本文主要讨论了单叶曲的直纹性,指出它在建筑工程中的应用,并对直纹的教学作了探讨。