AC fault security power source system is to provide alternating current for unit safety shutdown when power cut happens for a long time due to power grid failure or other reasons.
交流事故保安电源系统是当电网发生事故或其他原因致使火电厂厂用电长时间停电时，提供机组安全停机所必需的交流用电系统。
Abstract: the public rental housing security level and the housing rent subsidies of the family unit are the core problems for the design of public rental housing system.
摘要：公租房的保障水平、以家庭为单位的租金补贴金额的测算是公租房制度设计中需要研究的核心问题。
Limited unit calculation and project practice verified that types and coefficients of bracing system are reasonable and can ensure the security of the project.
有限元计算验证和工程实践表明，支护型式和参数是合理的，可以确保工程的安全。
Unit 2: This unit includes chapter 3 and chapter 4. The security model has been designed by the studies on the security of the data and information system.
第二部分，通过对数据及信息系统安全的探讨得出列车运行图信息系统的安全模型，包括第三、四章。
A new scheme in chaos security communication, the time-variable system added in the transmission and reception unit, is proposed in this paper. This way can make the system be double-secure.
本文提出了一种保密通信的新设想，也就是在通常的混沌通信系统的收发端，各增加一个时变系统，可以达到“双重加密”的目的。
The safety operation of the reaction and regeneration system is the prerequisite of security in production of the entire fluid catalytic cracking unit.
反应再生过程的安全运行是整个催化裂化装置安全生产的必要前提。
The safety operation of the reaction and regeneration system is the prerequisite of security in production of the entire fluid catalytic cracking unit.
反应再生过程的安全运行是整个催化裂化装置安全生产的必要前提。
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