It is introduced in this paper the composition and installation techniques of conductor rails in the urban rail transit power supply system.
简要介绍了城市轨道交通供电系统中接触轨的组成及安装工艺方法。
The composition and calculating principle of construction and installation cost are introduced, the measures to control it discussed.
介绍了建筑安装费用的组成及计算原则，探讨了控制建筑安装费用的措施。
The microcomputer based nuclear balance is applied in large urea plant. Its system composition, measurement principle, installation, calibration and problems discovered during testing are introduced.
介绍了大型尿素装置中微机核子秤的系统构成，测量原理、安装、调校及在调试过程中发现的问题。
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