通电运转局部保护机油压力
etr partial protection oil pressure
常规无线电通信
general radiocommunication
超越地平线无线电通讯
radio communication beyond the horizon
船舶无线电通信
marine radio communication
地面无线电通信
terrestrial radiocommunication
terrestrial radio communication
短距离无线电通信
short-range radio communications
Short-distance radio communication
多通道无线电通信
multichannel radio communication
Communication
multichannel radio
分米波无线电通讯
decimeter radio communication
附加无线电通信规则
additional radio regulation