The foundation of automatic block and cab signal is track circuit.
自动闭塞和机车信号的基础是轨道电路。
Patent circuit design with Intelligent automatic breakdown detection and quick emergency switch times.
专利模块电路设计，智能故障自动检测，应急转换时间快。
The design concept, circuit principle and control program of this automatic control system are described.
文章阐述了该控制系统的设计思路、电路原理及控制方案。
The design concept, circuit principle and control program of this automatic control system are described.
文章阐述了该控制系统的设计思路、电路原理及控制方案。
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