A.各級電力調(diào)度專用廣域數(shù)據(jù)網(wǎng)絡 B.用于遠程維護調(diào)度專用撥號網(wǎng)絡
A.25%~50%UN B.50%~75%UN C.75%~100%UN
A.30% B.40% C.50%