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合肥电务段管辖京九线15站(王楼-阜南站),于2005年10~11月新上ZPW-2000A移频自动闭塞及ZPW-2000A站内闭环电码化。在此次“三改四”工程中,所有自动闭塞轨道电路接收器均设置了检查相邻小轨道载频小频率选型条件,即本区段的接收器只接收运行内方相邻区段的小轨道信息。具体地说
Hefei electricity segment under the jurisdiction of Beijing-Kowloon Line 15 stations (Wang Lou - Funan Station), in 2005 10 ~ November new ZPW-2000A frequency shift automatic blocking and ZPW-2000A station closed-loop coding. In this project of “three changes and four projects”, all receivers of automatic blocking track circuits are set to check the small-frequency selection conditions of the adjacent small-track carrier frequency, that is, the receivers in this section only receive the small Track information. Specifically