The chip could work through electricity from USB ports without external electricity supply, so it was suitable for peripheral equipment of computers such as MP3 and PDA palmtop computers.

该芯片还能从US B端口取电工作，无须外接电源，特别适合用于电脑的周边设备中，如mp3、PDA掌上电脑等。

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The basic measure to protect from large area pollutant flashover is to increase overall external insulation level for transmission and substation equipment.

防治电网大面积污闪的根本出路是提高输变电设备外绝缘的总体水平。

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From three aspects of the external factors, equipment and personnel, this paper probes into the causes of enterprise's plant wide power failure, and puts forward some prevention measures.

从外因、设备、人员三方面探析了企业全厂性停电的原因，并提出了一些预防对策。

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