求解这个数控铣床手工编程题

朋友：你好！
我帮你编了！程序如下：

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O0000
(PROGRAM NAME - T11)
(DATE=DD-MM-YY - 04-01-15 TIME=HH:MM - 15:05)
N100G21
N102G0G17G40G49G80G90
( 10. FLAT ENDMILL TOOL - 1 DIA. OFF. - 1 LEN. - 1 DIA. - 10.)
N104T1M6
N106G0G90X-31.Y-19.998A0.S1900M3
N108G43H1Z50.
N110Z4.
N112G1Z-2.F400.
N114X31.F200.
N116G0Z20.
N118X-31.Y-13.332
N120Z2.
N122G1Z-2.F400.
N124X31.F200.
N126G0Z20.
N128X-31.Y-6.666
N130Z2.
N132G1Z-2.F400.
N134X31.F200.
N136G0Z20.
N138X-31.Y0.
N140Z2.
N142G1Z-2.F400.
N144X31.F200.
N146G0Z20.
N148X-31.Y6.666
N150Z2.
N152G1Z-2.F400.
N154X31.F200.
N156G0Z20.
N158X-31.Y13.332
N160Z2.
N162G1Z-2.F400.
N164X31.F200.
N166G0Z20.
N168X-31.Y19.998
N170Z2.
N172G1Z-2.F400.
N174X31.F200.
N176G0Z50.
N178X-24.75Y-24.75
N180Z2.
N182G1Z-5.F400.
N184X24.75F200.
N186Y-17.679
N188X16.25
N190Y-17.
N192G2X17.Y-16.25R.75
N194G1X22.25
N196Y-10.607
N198X24.75
N200Y-3.536
N202X22.25
N204Y3.536
N206X24.75
N208Y10.607
N210X22.25
N212Y11.
N214G3X20.053Y17.679R11.25
N216G1X24.75
N218Y24.75
N220X-24.75
N222Y17.679
N224X-20.053
N226G3X-22.25Y11.R11.25
N228G1Y10.607
N230X-24.75
N232Y3.536
N234X-22.25
N236Y-3.536
N238X-24.75
N240Y-10.607
N242X-19.825
N244X-16.35Y-16.625
N246G3X-15.661Y-17.679R11.25
N248G1X-24.75
N250X-19.882Y-10.508
N252X-22.25Y-6.407
N254Y11.
N256G2X-11.Y22.25R11.25
N258G1X-.75
N260Y17.679
N262X.75
N264G0Z20.
N266X25.Y-25.
N268Z2.
N270G1Z-5.F400.
N272X-25.F200.
N274Y25.
N276X25.
N278Y-25.
N280G0Z20.
N282X-6.608Y-22.
N284Z2.
N286G1Z-5.F400.
N288X16.F200.
N290Y-17.
N292G2X17.Y-16.R1.
N294G1X22.
N296Y11.
N298G3X11.Y22.R11.
N300G1X1.
N302Y17.
N304G2X-1.R1.
N306G1Y22.
N308X-11.
N310G3X-22.Y11.R11.
N312G1Y-6.34
N314X-16.134Y-16.5
N316G3X-6.608Y-22.R11.
N318G0Z50.
N320M5
N322G91G28Z0.
N324G28X0.Y0.A0.
N326M30
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