The application mode of Urban Comprehensive Function GIS will serve the office automation, scientific research and socialization of services.
城市综合功能GIS的应用模式为:办公自动化、科研和社会化服务。
This paper describes the origin, definition and function of fallback mode of moving block system for urban rail transit.
介绍城市轨道交通中,移动闭塞系统的后备模式的由来、定义及其功能。
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