接力发射机
1. 中继发射机：relay transformer 中继变压器 | relay transmitter 中继发射机 | relay type follow-up steering apparatus 续电式随动操舵仪
2. 接力发射机=>中継送信機：relay transfer time ==> 继电器触点转接时间,继电器转接时间 | relay transmitter ==> 接力发射机=>中継送信機 | relay tree circuit ==> 继电器树枝状电路
noun
1. an amplifier for restoring the strength of a transmitted signal
Synonym: booster booster amplifier booster station relay link relay station