程序参考：
O0902
G54G90G00Z20
X60Y30
M07
M03S800
G01Z-3F100
G68X0Y0R72
M98P0100
G68X0Y0R144
M98P0100
G68X0Y0R216
M98P0100
G68X0Y0R288
M98P0100
G68X0Y0R360
M98P0100
G69
G00X60Y-20
G01Z-6F100
G42X55Y0
G03X-55Y0F100
G01G40X60Y20
M09
G00Z20
X0Y0
M05
M30
O0100
G01X60Y24.45F100
X14.86
X2.01Y60
X11.47
X21.4Y29.45
X50
Y38.45
X27.94
X20.93Y60
X28.29
X33.02Y45.45
X50
M99
