Video frequency device, display method, record method and reproducing method.

视频装置，显示方法，记录方法和再现方法。

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Similarly, another company had developed an RF frequency device and that also didn't work very well.

相似地，另一家公司开发的射频装置效果也不是很好。

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Low cost high-frequency device, high-frequency amplifying method, radio communication device and mobile phone.

低成本高频装置，高频放大方法，无线通信装置和移动电话。

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The engineers found a way to kick-start a radio-frequency device wirelessly using an external power source initially, but running the device afterward on the output of power generated by the inner ear.

WSJ: Harnessing Energy From the Body to Power Devices

In a study published in 2006, researchers at Carnegie Mellon University who rode 37 airline flights with a radio-frequency measuring device found emissions from cellphones that could interfere with global-positioning satellite systems.

WSJ: 'Turn Off All Electronic Devices:' And What Happens if You Don't

It works by jamming all nearby transmissions at the operating frequency of the medical device, except for those signals that were authorized to use the device.

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