计算圈数和线径

 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

请大侠帮忙算出圈数和线径，谢谢。