过电撂电器过电流继电器过流继电器最大电撂电器relay: n. 1.接替的马;驿马;接替的狗;(备有接替马匹的)旅 ...a-c directional overcurrent relay: 交流方向性超流断电器ac time overcurrent relay: 交流定时过流继电器dc overcurrent relay: 直流过流继电器directional overcurrent relay: 定向过流继电器; 定向过载继电器下载手机词典可随时随地查词查翻译