During a seven-day auction on eBay that ended on May 29, Novocin says he sold four items, including an X-Band Weather Radar Modulator for and a high-frequency radio circuit card for .

最后，经过七天的竞价，诺沃辛卖出了四件零件，包括以500美元的售价卖出一个雷达调节器和以32美元卖出一个高频无线电电路板。

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The operating band of an individual antenna covers e. g. the frequency range used by a radio system or only the transmitting or receiving band in that range.

单个天线的工作频带覆盖了例如由无线电系统所使用的频率范围或者只是该频率范围内的发射频带或接收频带。

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Short wave is radio frequency band earliest utilized by human being, and short wave communication is one modern communication method with a long history.

短波是人类最早开发利用的无线电频段，短波通信是历史最为悠久的现代通信手段之一。

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They emitted so much radio-frequency interference that Mr. Clark struggled to get a clear signal for the band's wireless instruments and in-ear monitors.

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