A.安裝,發(fā)電,變電,配電,用電 B.安裝,發(fā)電,變電,送電,配電 C.發(fā)電,變電,送電,配電,用電
A.±0.2Hz B.±0.5Hz C.±0.3Hz
A.35/11kV B.38.5/6.3kV C.121/38.5/6.3kV D.110/38.5/11kV E.121/6.3kV F.121/10.5kV