圆锥与圆球相贯线上最左点的确定

运用数学解析法，给出了相贯线正面投影的数学表达式，从而确定了最左点的坐标，并由此获得了用几何作图作出该点的简捷方法，还对圆球直径变化时最左点的变化规律进行了分析。

The Determination of Ultrs-left Point on Intersection Line of Cone and Sphere

When the cone and the sphere intersects (the location of two bodies is shown in Fig.1), whether or not the projection of ultra-left point on intersecting line is finded out, it will affect the precise of intersecting line directly, However, there is no paper that presents and discusses the method to fed the ultra-left point now.The paper parents a calculation method to find the interection of two curcved surface equation. It gives the precise position of the ulha-left point on intersecting line. In order to dermine the ultra-left point by geometric drawing the authors transform the analytic method into illustlated diagram And analysis of the ultra-left point variation for interseting line of the same cone with different diameter is made.