圆锥图

chirograph───n.[法]正式签字的文件；亲笔字据；教皇的亲笔特许证书

clinograph───倾斜仪

copygraph───n.油印机

coronagraph───n.[天]日冕仪（等于coronograph）

coronograph───n.日冕观测仪

crescograph───植物生长记录器

helicograph───n.（画螺旋曲线用的）螺旋规

Thus, we give a make-graph method of conic section on plane with arbitrary point as foci, arbitrary line as directrices and arbitrary positive number as eccentricity.───从而给出了以平面上任意点为焦点、任意直线为准线，任意正数为离心率的圆锥曲线的直接作图方法。