A.220B.330C.400D.500
A.分析故障性質(zhì)→故障點(diǎn)粗測→故障點(diǎn)定位B.故障點(diǎn)粗測→分析故障性質(zhì)→故障點(diǎn)定位C.分析故障性質(zhì)→故障點(diǎn)定位→故障點(diǎn)粗測D.故障點(diǎn)定位→故障點(diǎn)粗測→分析故障性質(zhì)
A.A類B.B類C.C類D.D類