Conic Arc by Five Points 五点决定的
By using circular arc project, the relative positions of the conic curves and other spatial geometrical elements can be solved for simplified and precise drawings.
用圆弧投射法解决圆锥曲线与其它空间几何要素的相互位置问题，可使作图更为简练、精确。
In fact, according to the group, the a stands for Alcoa, the "arc" for the "arc of progress", and the "conic" alludes 9 to the iconic products the company produces.
实际上，按该集团的说法，a代表美国铝业，“arc”代表“进步弧线”，而“conic”暗指该公司生产的标志性产品。
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