An equation is derived to show the intersecting line where circular column and circular cone are arbitrarily intersected except that two axial lines are parallel;and to discriminate the visibility.

• 推导出任意相交（两轴线为平行线情况除外）圆柱圆锥相贯线和判别可见性的方程，并给出求该相贯线投影和判别可见性的程序的编制方法及其流程图。