【摘要】 针对国家标准《机械制图》允许相贯线简化，可用“圆弧或直线代替非圆曲线”，论述了相贯线简化的原则，并提出了用折线代替非圆曲线的新的简画方法更多还原

【Abstract】 This paper is aimed at the national standard mechanical drawing that permitting simple drawing for line of intersecting surface and replacing non-circle curve by arc or straight-line, and also illustrated the principle of simple drawing for line of intersecting surface, indicated the new simple method that replacing non-circle curve by fold-line.更多还原