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简要介绍3种数字编码轨道电路系统功能、结构、工作原理、性能指标和信息内容等,并进行了分析比较,指出其发展方向。
Briefly introduce the function, structure, working principle, performance index and information content of the three kinds of digital coding track circuit system, and make an analysis and comparison, pointing out the development direction.