用辅助球面法求圆球和圆锥相贯线上特殊点

Diagraming the characteristic points on the intersection lines between a sphere and a cone by means of the method of anxiliary sphere

提出１ 种准确图解相贯线上最左、最右特殊点的方法，并加以证明．同时从几何的角度分析求解相贯线上最前、最后特殊点的方法，并且指出无法准确图解圆球和圆锥相贯线上最前、最后的特殊点．

A method of precisely diagramming the left hand or right hand point on the intersection lines was introduced. It was analyzed how to diagram the frontest and the rearest points on the intersection lines based on geometry and it was pointed out that these points could not be precisely diagramed.