radio relay system meaning in English

通讯替续系统
无线电接力系统
无线电中断系统
无线电中继系统

Trans - horizon radio relay system
超视距微波中继系统
Nov . 13 , opening of new york - boston radio relay system for experimental service
11月13日，纽约至波士顿的无线电中继系统试验性开通。
Fixed radio systems - point - to - point equipment - high capacity digital radio relay systems carrying stm - 4 , 4 x stm - 1 or 2 x stm - 1 signals in bands with 55 56 mhz channel spacing
固定无线电系统.点对点设备.频带为55 56mhz信道空间的载stm - 4 4xstm - 1或2x stm - 1信号的大容量数字无线电中继系统