A.2塊 B.3塊 C.4塊 D.6塊
A.技術(shù)規(guī)范 B.安全標(biāo)準(zhǔn) C.法律法規(guī) D.質(zhì)量標(biāo)準(zhǔn)
A.110kV,不得大于8% B.110kV,不得大于0.5% C.220~330kV,不得大于0.35% D.220~330kV,不得大于2%