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北京地铁一号线延伸段(西单至四惠东)的地铁列车采用世界上最先进的VVVF(变压变频)交流调速车。用于监视列车主要设备的监控系统,不仅单节车自成一个网络系统,而且整列车形成一个局域网系统。
Subway train of Beijing Subway Line 1 (Xidan to Sihui East) uses the world’s most advanced VVVF (variable frequency variable frequency) AC speed train. Used to monitor the train main equipment monitoring system, not only a single car into a network system, and the entire train to form a local area network system.