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-operatedadj.继电器操作的relay translation转译relay cooperation中继协作relay engineering继电器学Relay data source保护信息源relayed line unit中继线设备relay transaction转接事务relay puse sender中继脉冲发送器relay cycle timer继电器式周期定时器,继电器式循环定时器,周期定时继电器relaying envelope中继包封