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。
This paper analyses the problems in reducing costs in metallic mines and presents that economizing energy and enhancing safety are two workable approaches to the efficient safety economy.
本文从节能及加强安全管理两方面对减少金属矿山的安全经济投入问题进行了分析与探讨，达到提高安全经济运行效率的目的。
This paper analyses the problems in reducing costs in metallic mines and presents that economizing energy and enhancing safety are two workable approaches to the efficient safety economy.
本文从节能及加强安全管理两方面对减少金属矿山的安全经济投入问题进行了分析与探讨，达到提高安全经济运行效率的目的。
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