A.負(fù)載對(duì)稱的三相三線制B.負(fù)載不對(duì)稱的三相三線制C.負(fù)載對(duì)稱的三相四線制D.負(fù)載不對(duì)稱的三相四線制
A.磁電系流比計(jì)式B.電磁式C.電動(dòng)式D.感應(yīng)式