The paper mainly focus on these two aspects to solve the safety problems of the system, identity recognition and the formation, distribution and delivery of the key code.

文中主要是从身份的识别和密钥生成、分配、传递体系，这两个方面分析和解决系统的安全问题。

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Cost for operation ventilation, operation safety, smog exhaust during a fire and its control and other key problems are well addressed.

在满足通风要求的基础上，重点研究了通风运营成本及运营安全、火灾排烟及火灾通风控制等关键问题。

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Abstract: : with the people to fire safety problems of attention gradually, fire materials research and development and application of natural as fire safety of the key.

摘要：随着人们对消防安全问题的逐步重视，防火材料的研发与应用自然成为消防安全的关键。

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