1.
radio frequency emission testing
无线电频率放射测试
2.
international distress radio frequency
国际呼救无线电频率
3.
a radio-frequency amplifier.
一种无线电频率放大器。
4.
public safety radio frequency
公共安全无线电频率
5.
distress frequency
无线电频率遇险呼救频率
6.
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）.
7.
or 1420 megacycles per second.
即秒1420兆周的精确无线电频率。
8.
picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources.
从外陆来源的无线电频率范围内接受电磁射线。
9.
The medium used for the transmission of radio and television signals.Often used in the plural.
波段，无线电频率传送无线电和电视信号的媒介。常用复数
10.
combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two.
把一种无线电频率和当地不同的另一种频率混合的一起。
11.
To provide frequencies for the Olympic Games, we will strengthen the overall planning and management of radio frequencies.
加强无线电频率的统筹规划，为奥运会做好频率准备；
12.
The inappropriate frequency configuration in subway often generates the problem of radio frequency interference.
提出了地铁中由于频率配置不当产生无线电频率干扰问题。
13.
frequency tolerance of radio transmitter
无线电发射机频率容限
14.
marine frequency
海上无线电通信频率
15.
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
16.
He tuned his radio to the police frequency.
他把无线电调到警方的频率。
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