A.下限220V,上限264V B.下限187V,上限220V C.下限187V,上限264V D.下限220V,上限380V
A.正向額定總壓降20V,每級4V B.正向額定總壓降20V,每級5V C.正向額定總壓降35V,每級5V D.正向額定總壓降35V,每級7V