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信号过渡工程中，如何充分利用既有组合，实现新联锁关系，缩短施工时间，最大限度减少行车干扰，减少工程投资是一个重要的研究课题，本文结合具体工程设计，介绍了几种切实可行的特殊电路的设计方法。
In the signal transition project, how to make full use of the existing combination to realize the new interlocking relationship, shorten the construction time, minimize the traffic disturbance and reduce the project investment is an important research topic. In this paper, several practical projects are introduced according to the specific engineering design Special circuit design method.