1.
A return telephone or radio call.
回答信号返回的电话或无线电传呼
2.
international radio call sign
《国际无线电呼号》
3.
A station for radio transmitting.
无线电台无线电传送站
4.
international distress radio frequency
国际呼救无线电频率
5.
Distress Radio Call System
遇险无线电呼叫系统
6.
International Radio Service of Call Signs
《国际无线电呼号分类表》
7.
radio typewriter
无线电电传打字电报机
8.
Radio waves travel in straight lines.
无线电波是直线传播的。
9.
Transmission of messages by radiotelegraphy.
用无线电传真传送信息
10.
radio wave propagation in the ionosphere
电离层无线电波传播
11.
automatic teleprinting-over-radio
自动无线电电传打印机
12.
To send(a signal), as by wire or radio.
传送通过电线或无线电等传送（信号）
13.
distress frequency
无线电频率遇险呼救频率
14.
marine calling and distress radio telephony frequency
海上呼叫和遇险无线电话频率
15.
I'll use my car radio to call for help.
我现在就用车上无线电呼叫求援。
16.
The wireless calls were soon responded to.
对无线电的呼叫不久有了回答。
17.
an internationally recognized distress signal via radiotelephone (from the French m'aider).
国际公认的无线电话呼救信号。
18.
Temporary regulation for design of high speed radio paging engineering
高速无线电寻呼工程设计暂行规定