Type DD-4 centralized traffic control system is designed for the computer aided CTC system of the test section near Tianjin. It is a system used for manual control as well as computer control.
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释义
DD-4型调度集中系统是为天津附近行车指挥自动化系统试验区段设计的,系统既要用于计算机控制还要用于人工控制。
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