Relays and relay systems associated with electric power apparatus 与电源设备有关的继电器和中继系统
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。
Withstand capability of relay systems to radiated electromagnetic interference from transceivers 中继系统对无线电收发信机辐射电磁干扰的抵抗能力
Surge withstand capability tests for relays and relay systems associated with electric power apparatus 与电力装置相关的继电器和中继系统的耐电涌性能试验
Standard for withstand capability of relay systems to radiated electromagnetic interference from transceivers 中继系统对无线电收发机辐射电磁干扰的抵抗能力标准
Swc . surge withstand capability tests for relays and relay systems associated with electric power apparatus ; correction 与电力装置相关的继电器和中继系统的耐电涌性能
Cable trunking systems and cable ducting systems for electrical installations - part 1 : general requirements ; german version en 50085 - 1 : 2005 电气设备用电缆中继系统和电缆管道系统.第1部分:一般
Methods of measurement for equipment used in terrestrial radio - relay systems ; part 3 : simulated systems iec 60487 - 3 : 1975 ; german version hd 477 . 3 s1 : 1988 地面无线电中继系统设备的测量方法.第3部分:模拟系统
Methods of measurement for equipment used in terrestrial radio - relay system ; measurements for sub - systems ; general ; identique with iec 487 - 2 - 1 , edition 1981 地面无线电中继系统设备测量方法.第2部分:分系统测量