文章针对地铁旅客信息服务系统实际情况，提出不同系统方案，并进行了优缺点比较。
According to the real conditions of passenger information service system of metros, different schemes with advantages and disadvantages compared are given in the paper.
文章针对地铁旅客信息服务系统实际情况，提出不同系统方案，并进行了优缺点比较。
According to the real conditions of passenger information service system of metros, different schemes with advantages and disadvantages compared are given in the paper.
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