解：选用T1=中心钻、T2=ф8中心钻、T3=ф8.8中心钻、T4=M10丝锥。
O001
G17 G40 G80
N001 G00 G91 G30 X0 Y0 Z0 T1;
M06;
G00 G90 G55 X-125.Y-50.;
G43 H01 Z10 M03 S1800;
G99 G81 Z-22. R-17 F200;
Y0.;
Y50.;
X-75.;
Y0.;
G98 Y-50.;
Z-3. R3.X0.;
Y0.;
Y50.;
X75. ;
.
.
.
G00 G80 Z100.;
N001 G00 G91 G30 X0 Y0 Z0 T2;
M06;
G00 G90 G55 X-125.Y-50.;
G43 H01 Z10 M03 S1000;
G99 G73 Z-65. R-17 Q20 F200;
Y0.;
Y50.;
Y0.;
G98 Y-50.;
G99 X75. Y50.;
Y0.;
Y-50.;
X125.;
Y0.;
Y50.;
G00 G80 Z100.;
N001 G00 G91 G30 X0 Y0 Z0 T3;
M06;
G00 G90 G55 X0.Y-50.;
G43 H03 Z20 M03 S800;
G99 G81 Z-21. R3 F200;
Y0.;
Y50.;
G00 G80 Z100.;
N001 G00 G91 G30 X0 Y0 Z0 T4;
M06;
G00 G90 G55 X0.Y-50.;
G43 H04 Z20 M03 S200;
G99 G84 Z-15. R-5 F1.25;
Y0.;
Y50.;
G00 G80 Z100.;
M30;
