Besides, the projecting formula of the circular arc is also listed in the paper, which can offer the computer a calculating method to draw stereoscopic projection.
本文还给出了圆弧的投影方程，为计算机绘制极赤图提供了计算方法。
Besides, the projecting formula of the circular arc is also listed in the paper, which can offer the computer a calculating method to draw stereoscopic projection.
本文还给出了圆弧的投影方程，为计算机绘制极赤图提供了计算方法。
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