relayingn.继电保护；转播动词relay的现在分词.relayvt.转播；转达；中继；接力；接替n.继电器；接力赛；替班relay amplifier中继放大器relay plugboard继电器插座板relaycorrelator继电式相关器relay equipment继电设备relay regulator断续式调节器,继电调节系统relay condenser中继聚光镜relay circuitry继电器电路学relay operation继电器动作relay terminals定子接线柱relay air valve继动空气阀