Aim: To study the diagnosis and treatment of ependymoma in conus medullaris and cauda equins.
目的:探讨圆锥马尾部室管膜瘤的诊断及手术治疗特点。
The spherical method and auxiliary plane method are usually apply in making up the intersection line, while cylinder and circular cone intersect each other diagonally.
求作圆柱面与圆锥面轴线斜交时的相贯线 ,通常用的作图方法是球面法或辅助平面法。