The application of optical fiber communications in university security precaution system is described generally.

概述了光纤通信在高校安全防范系统中的应用。

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This paper introduces the transformer substation mistake precaution system simply, and presents the needs and function modules at the very beginning.

本文首先对变电站微机防误系统作了一个简单的介绍，将其需求和功能模块呈现出来。

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The purpose of the article is to provide the reference model for the research, design and implementation of the precaution system against hacker attack.

目的是为我国黑客入侵防范体系的研究、设计与实现提供一个参考模型。

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Trash cans and recycling bins are being removed from certain areas of Washington's Metro subway system as a safety precaution.

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Another basic precaution against the small-fry hacker is to turn on security features built into the operating system, Winkler said.

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The system is modeled after military base security protocols in which a color code signifies the level of precaution and perceived threat, according to two officials involved in developing it.

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