A.型號(hào)相同 B.聯(lián)接組標(biāo)號(hào)相同 C.變比相等 D.短路電壓相等
A.±2.5% B.±5% C.-7.5%~+5% D.-10%~+5%
A.380V B.220V C.110V D.48V