圈比 (2-1):(9-11)=4:1(tie 9+10,11+12)

                                                                     (2-1):(7-8)=2.67:1

                                                                     (2-1):(5-4)=1.85:1

Inductance=60uH,  Frequency=250KHz

請大俠幫忙算出圈數和線徑，謝謝。