在较新式的同轴电缆系统中，传输信号的频率高得多，所要只每隔四英里装一个放大器。
In the newer type coaxial system, the signals transmitted are much higher in frequency and amplifiers are required every four miles.
在较新式的同轴电缆系统中，传输信号的频率高得多，所要只每隔四英里装一个放大器。
In the newer type coaxial system, the signals transmitted are much higher in frequency and amplifiers are required every four miles.
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