A.1Y123 B.1U123 C.1E123 D.1S123
A.電流速斷保護(hù) B.定時(shí)限過(guò)電流保護(hù) C.反時(shí)限過(guò)電流保護(hù) D.限時(shí)電流速斷保護(hù)
A.1TA B.4TA C.11TA D.19TA