以回转面为辅助面求相贯线

The Method of Drawing the Line of Intersection Depending on Plane of Rotation as Auxilliary Plane

根据画法几何中“三面共点”的原理，对以回转面为辅助面求解相贯线的方法进行了介绍和分析。

The drawing of the line of intersection is often appeared in engineering drawing.Based on the principle in descriptive geometry that the same point is poccessed by three planes,the method of drawing the line of intersection depending on plane of rotation as auxiliary plane is intro-duced and analysed.