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| View Original: | Helsinki Metro signal Po 3.svg (201x377) | |||
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| Courtesy of: | commons.wikimedia.org | More Like This | ||
| Keywords: Helsinki Metro signal Po 3.svg en A Helsinki Metro primary signal showing the aspect Po 3 fi Helsingin metron pääopastin näyttää opastetta Po 3 Self-made in Inkscape Based on several source photos and http //www raitio org/metro/turva/metrop htm Mysid 2010-06-24 Helsinki Metro Diagrams of railway signals in Finland | ||||
