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 interrupter继电式断续器relay preselector中继预选器relay rack ground继电器架接地relay protetction继电保护relay end voltage继电器端电压relay switchboard继电器盘relay adjust chart继电器调整表relay orienteering接力式定向赛relay-controlled中继控制relay pulse sender中继脉冲发送器