探讨了一种利用平面迹线和几何作图法，作无灭光线下透视阴影的新方法。
This paper presents a new method of drawing perspective shade and shadow in parallel rays, which makes use of plane trace and geometrical drawing method.
对过椭圆外一定点的法线作图问题作了探讨，指出了几何作图法的不可解性。
This paper discusses the graphic problem of ellipse normal through a point outside the ellipse. Concluded are the unsolvability of geometric graphic method to solve this problem .
本文从互为对偶的电网络的线图矩阵间关系的分析，得出求作对偶电网络的矩阵法。它异于常用的几何作图法。
After analyzing the relations between graph matrices of dual electrical network a method of plotting the latter which is different from usual geometrically drawing method is presented in this paper.
变方向折线剖面是在地形、地质情况较为复杂地区普遍采用的实测地质剖面方法。其地质剖面图目前一般用几何作图方法以投影法成图。
The construction of the direction changing section is a method of measuring a geological section applied commonly in areas with complex topographic and geological condition.
它不仅对解决有关旋转抛物面交线的作图问题提供了很大的方便，同时还能解决一些用画法几何的一般作图法所不能解决的作图问题。
This new method not only is convenient to solve the graphy of intersecting curve of paraboloid of revolution, but also can solve some graphic problems which can not be …
它不仅对解决有关旋转抛物面交线的作图问题提供了很大的方便，同时还能解决一些用画法几何的一般作图法所不能解决的作图问题。
This new method not only is convenient to solve the graphy of intersecting curve of paraboloid of revolution, but also can solve some graphic problems which can not be …
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