A.30B.40C.50D.60
A.200B.300C.400D.500
A.吸收比≥1.3或極化指數(shù)≥1.5或絕緣電阻≥10000MΩB.吸收比≥1.3或極化指數(shù)≥1.5C.極化指數(shù)≥1.5或絕緣電阻≥10000MΩD.吸收比≥1.3或絕緣電阻≥10000MΩ