您要查找的是不是：
- secondary protection unit 二次保护单元
- Secondary protection shall be a pin expulsion type element complete with mechanically operated limit switch. 我想应该是：二级保护是一个连同机械的可操控限极开关的安全针排气类型的元件。
- Common pressure-relief devices are a pressure-relief valve for primary protection and a rupture disc for secondary protection. 常用的减压装置是一个作为主要保护的减压阀和一个作为二级保护的破裂盘。
- A programme to provide a secure radio system for the Witness Protection Unit and the VIP Protection Unit was completed. 为保护证人组及要员保护组安装一套安全通讯系统的计划已经完成。
- Easy operation and maintenance,reliable and lubricating system and protection unit of guideway. 机床操作、维护方便。配置有可靠的没头润滑系统和导轨防护装置。
- It was appraised as the important protection unit of cultural relic of the province. 1991年4月被列为省级重点文物保护单位。
- The MFR 11 model is a generator or mains protection unit packaged into one compact device. 该生产商11模型是一个发电机或水管保护单位，包装成一个紧凑的装置。
- The MFR 13 model is a complete generator protection unit packaged into one compact device. 该生产商13模型是一个完整的发电机保护单位包装成一个紧凑的装置。
- Ding sites for national key cultural relics protection units. 定窑遗址为国家重点文物保护单位。
- In 1982, the scenic area was promulgated as a national key cultural object protection unit and a national key scenic site. 1982年，乐山大佛景区被国务院公布为全国重点文物保护单位和国家风景名胜区。
- Within the context of EIB systems, the measures taken are often called primary and secondary protective measures. 根据EIB系统内部结构而产生的不同避雷方法通常被称为初级和次级保护措施。
- The South African government has been criticised for disbanding the police’s endangered species protection unit in 2003. 由于南非政府2003年解散了警方保护濒危物种的部门，因此，南非政府一直以来倍受国际社会的批评。
- This paper put it forward as the remodeling equipment, which generator &transformer relay protection unit produced by China. 提出了采用国产微机型发-变组保护装置作为该厂机组保护改型设备；
- In this paper, the ancient site of Han Chang'an City attributes to be the National Relic Protection Unit, at the same time the archaeology protection research is being carried on. 本文研究的汉长安城遗址属于国家级文物保护单位并且考古保护研究工作一直在进行中。
- YouliCastle, the National AAAA Tourist Attraction and the National Key Protection Unit, is the cultural inheritance from Longshan to the Shangzhou Dynasty. 羑里城，国家AAAA级旅游景区、全国重点文物保护单位。
- Wu Linyuan scenic spot is a national forest park,geographical park,natural reservation,and the world natural heritage landscape protection unit subordinated to UNESCO. 武陵源风景名胜区系国家森林公园、地质公园和自然保护区,属联合国教科文组织的世界自然遗产景观保护单位。
- The principle, function and design of a microcontroller-based protection unit for substation and switchgear of terminal user is described in this paper. 简述了终端用户微机保护装置的原理、功能和软硬件实现方法。
- The memory management unit is designed after analyzing the timing and protectingrequirements. The design thought for mapping virtual address space into physical address space,block protection unit and Cache are also discussed. 通过分析该微处理器访存的时序要求以及对存储器保护的要求,设计了具有自主知识产权的存储器管理部件,论述了逻辑地址映射到物理地址、存储块保护以及Cache设计思想。
- Her age is of secondary interest. 她的年龄不太重要。
- Haifeng martyrs cemetery was founded in 1963, August 20, 1989, the State Council for approval Haifeng martyrs cemetery to commemorate the martyrs of the key building protection unit. 海丰烈士陵园始建于1963年，1989年8月20日，国务院批准海丰烈士陵园为全国重点烈士纪念建筑物保护单位。
