1.
distress frequency
无线电频率遇险呼救频率
2.
international distress radio frequency
国际呼救无线电频率
3.
marine calling and distress radio telephony frequency
海上呼叫和遇险无线电话频率
4.
low power distress transmitter
低功率遇险呼救发信器
5.
radio frequency emission testing
无线电频率放射测试
6.
frequency tolerance of radio transmitter
无线电发射机频率容限
7.
marine frequency
海上无线电通信频率
8.
a radio-frequency amplifier.
一种无线电频率放大器。
9.
public safety radio frequency
公共安全无线电频率
10.
very high frequency(abbr. VHF) radio frequency of 30 to 300 megahertz
甚高频（30到300兆赫的无线电频率）.
11.
An electronic device that converts one frequency of a radio signal to another.
变频器将无线电讯号从一种频率转换成另一种频率的电子装置
12.
An international radiotelephone signal word used by aircraft and ships in distress.
呼救信号遇险的飞机、船只等使用的国际无线电呼救信号
13.
Distress Radio Call System
遇险无线电呼叫系统
14.
Choice of Signal IF and Sampling Frequency in Software Radio
软件无线电中信号中频与采样频率选择
15.
He tuned his radio to the police frequency.
他把无线电调到警方的频率。
16.
or 1420 megacycles per second.
即秒1420兆周的精确无线电频率。
17.
This radio signal has a frequency of200,000 cycles per second.
这个无线电信号的频率是每秒200,000周期。
18.
ultra-high-frequency radio system
特高频率无线电通信系统