Glass screens, new signalling tech on Delhi Metro's magenta line

[ahlam1399]

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أكثر... (http://www.msn.com/en-in/news/newsindia/glass-screens-for-safety-new-signalling-technology-among-many-firsts-on-delhi-metros-magenta-line/ar-BBH9Z6t?li=AAgges1&srcref=rss)