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Two calculating methods of straight line and Archimedes spiral approximating involute are introduced.
介绍了用直线及阿基米德螺旋线逼近渐开线的两种方法.
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The principle of this method is to use Archimedes spiral to approaching ellipse.
该方法的实质是用阿基米德螺旋线去逼近离散椭圆.
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