看下這個
85Hb~|0 EDGES !! or CURVE
\!["U`\.K R=5 !! Vertex radius of curvature
X~ AE?? K=-1 !! Conic constant
>,Zf3M H=5 !! Outer aperture height
^mu?V-4 O=0 !! Inner obscuration height
J,bE[52 CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構(gòu)建拋物線
z&6TdwhV SHIFT Y 1 !!偏移
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