短語詞組短語differential protection relay 差動保護繼電器Differential current relay 差流繼電器;差流替續(xù)器;差動電流繼電器Differential Protective Relay 差動保護;差動保護繼電器;差接保護電驛;繙譯differential undervoltage relay 反流割斷器differential minimum relay 差動低限繼電器differential voltage relay 差動電圧継電器digital differential protection relay 型數(shù)字式差動保護繼電器differential type relay 差動式繼電器;差動電流繼動器differential line relay 縱差線路保護 返回 differential relay