Command: Circle0 Y9 Y2 U0 M& r3 x
Specify center point for circle or [3P/2P/Ttr (tan tan radius)]: 3p ! C2 c- g$ C( h) g$ ISpecify first point on circle: tan to! X# y7 I3 o, V+ p
Specify second point on circle: tan to4 y4 M7 l% ], e" g K4 K
Specify third point on circle: per to 选中心线