It is proved in practice that for the data acquisition system of protective relaying testing instrument replacing the serial transmission by USB communication is imperative.

实践证明，在继电保护测试仪的数据采集系统中用usb传输取代串口传输是势在必行的。

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Transmission without distortion, which can greatly improve the capacity and relaying distance of the optical communication system, can be realized by using optical solitons.

利用光孤立子可实现无畸变传输，大大提高光纤通信系统的容量和中继距离。

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According to the Regulations, all relaying and transmission organs should not insert advertisements arranged by themselves.

《办法》还同时规定，各转播、传输机构，不得以任何形式插播自行组织的广告。

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