A.4B.6C.8D.10
A.上行數(shù)據(jù)B.下行數(shù)據(jù)C.語音數(shù)據(jù)D.上下行數(shù)據(jù)
A.調(diào)壓器B.電壓互感器C.電源D.電流互感器