中文说明：
此程序主要是根据已知条件，精确绘制两椭圆纯滚动啮合。
English Description：
This program is mainly based on the known conditions to accurately draw the pure rolling meshing of two ellipses
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中文说明：
此程序主要是根据已知条件，精确绘制两椭圆纯滚动啮合。
English Description：
This program is mainly based on the known conditions to accurately draw the pure rolling meshing of two ellipses