This courseware is used for finding the position of the endpoint of two intersecting triangles and drawing the surfaces, the isometric projection of the intersecting line and three-plane projection.
两平面交线课件主要功能用于求解各种位置两平面交线的端点、绘制两平面交线的正等轴测投影和三面投影。
Isometric drawing is much simpler than perspective drawing. Drawing instruments sre used to make the drawing in which the three principal axes make equal angles with the plane of projection.
等角图较透视图简单得多。它用绘图仪器绘画，三主要轴线与投影面所成的角相等。
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