A.2% B.2.50% C.3% D.3.50%
A.10S B.5S C.3S
A.遥控屏 B.遥测屏 C.遥信板
A.<=1s B.<=2s C.<=3s D.<=4s E.<=5s
A.设计 B.检修 C.运行
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