apolar conics[数] 从配极二次曲线
Conics s圆锥和圆锥曲线
similar conics[数] 相似二次曲线
homothetic conics位似二次曲线
conics fitting二次曲线拟合
outpolar conics外配极二次曲线
projective conics射影二次曲线
conjugate conics共轭圆锥曲线;[数] 共轭二次曲线
For this reason, we introduce a practical representation of quadric surfaces, and on the basis of that, algorithms of intersection points between quadric surfaces and several conics, fourth degree nonplanar space curves constructing their boundaries are developed.
为此，对一种实用的二次曲面表示方法——几何法进行了深入研究后，给出了构成二次曲面轮廓的几种二次曲线和空间四次曲线与二次曲面交点的求法。
The curves in clothing CAD ,which having been analyzed , had“gentle”characters, in other words ,they can described conics、lines in addition to free curves and be stored and processed by computer with facility .
服装CAD曲线具有“柔性”的特点,也就是说既能够表示标准的圆锥曲线、直线,同时也能表示自由曲线,而且必须能够容易被计算机存储和处理。
参考来源 - 面向对象的服装打/推系统的研究与开发N（名词） the branch of geometry concerned with the parabola, ellipse, and hyperbola 圆锥曲线论