relaysetn.继电器组(继电器装置)relayvt.转播；转达；中继；接力；接替n.继电器；接力赛；替班relay broadcast无线电转播relayable rails重新铺用的钢轨,废钢轨,旧钢轨relay racks bay继电器排架relaying system中继系统relaying method中继间法relay energized继电器吸动relay interface中继接口Relay protector继电保护装置relay synthesis接替合成relayprotection继电保护