摘要
介绍了 UM71与交流计数自动闭塞结合其出发信号机、正线电码化、离去口、接近口结合电路的改进。
The paper introduces the improvement of link circuits of UM71 and automatic block with AC counting code for their departure signal,coded main track,departure terminal,and approach terminal etc.
出处
《铁路通信信号工程技术》
2004年第1期16-18,共3页
Railway Signalling & Communication Engineering
