1) primary secondary system
一次及二次系统
2) primary/secondary systems
一二次泵系统
1.
Variable primary flow system is the newest system of center air-conditioning systems,which has large advantages in first-cost and operational cost than primary/secondary systems.
一次泵变流量VPF(variable primary flow)系统是中央空调系统的最新布置形式,与一二次泵系统相比在初投资和运行费用上更具有优势。
3) primary and secondary water system
一二次水系统
1.
Application of connectors and water mixers to primary and secondary water systems;
连通器和混水器在一二次水系统中的应用
4) primary system
一次系统
1.
In order to analyze all the factors in the problem of power system restoration(PSR) from a whole aspect and optimize the restoration process,this paper summarizes all kinds of issues relevant to PSR,which consist of not only the feature of primary system,but also the operator organization and auxiliary service of monitoring and control system.
为全面分析影响电力系统恢复过程的因素,分别从调度和运行机构、二次监控系统和一次系统3方面阐述影响恢复的诸多因素,提出系统恢复过程的整体模型。
5) secondary system
二次系统
1.
Hotline work technology on substation secondary system;
变电所二次系统带电作业技术
2.
Study of testing criteria for secondary systems of 110 kV digital substations
110kV数字化变电站二次系统检验规范的研究
3.
The article shows how to build a structure about safeguard system of secondary system in electric power control center in GanXi Region,which can help keeping the electric power network running safely,stably and economically.
文章主要阐述如何在赣西地区调度中心二次系统中建立安全防护体系,以达到保障赣西地区电网的安全、稳定、经济运行的目的。
6) quadratic system
二次系统
1.
Global structure of a class of quadratic system;
一类二次系统的全局结构
2.
Uniqueness of limit cycles of type Ⅲ quadratic system(Ⅰ);
Ⅲ类二次系统极限环的惟一性(Ⅰ)
补充资料：怀武昌栖一二首
【诗文】：
常忆能吟一，房连古帝墟。无端多忤物，唯我独知渠。
病愈囊空后，神清木落初。只因烽火起，书札自兹疏。
清风江上月，霜洒月中砧。得句先呈佛，无人知此心。
寂寥从鬼出，苍翠到门深。惟有双峰寺，时时独去寻。
【注释】：
【出处】：
全唐诗：卷830-7
常忆能吟一，房连古帝墟。无端多忤物，唯我独知渠。
病愈囊空后，神清木落初。只因烽火起，书札自兹疏。
清风江上月，霜洒月中砧。得句先呈佛，无人知此心。
寂寥从鬼出，苍翠到门深。惟有双峰寺，时时独去寻。
【注释】：
【出处】：
全唐诗：卷830-7
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条