The paper presents the graphic method of solution of the intersection of right elliptic cone with plane by rotation of auxiliary planes at a certain Angle.
提出一种将辅助平面旋转某个特定的角度图解正椭圆锥面截交线的方法。
By means of the multiple-planes orthographic projection of multidimensional space, both the graphic method and graphics of the mixture problems have been given.
用多维空间的多面正投影方式，给出物料混合问题的图示、图解计算方法。
By means of the multiple-planes orthographic projection of multidimensional space, both the graphic method and graphics of the mixture problems have been given.
用多维空间的多面正投影方式，给出物料混合问题的图示、图解计算方法。
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