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89280019 is a part of the Topmetro supervisory control system, which is a comprehensive control system for underground metro lines and networks. It is used for the optimization of underground metro lines and networks, providing reliability, safety and efficiency. The system includes a control center, a network of data points, and various controllers and monitoring equipment. It provides real-time monitoring and control of underground metropolitan networks, allowing the detection and prevention of any potential disruptions before they occur. Furthermore, the system enables automated analysis of various aspects such as train scheduling, traffic flow, and passenger safety, as well as statistical analysis of data.