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| View Original: | PKP-OS4.gif (32x65) | |||
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| Keywords: PKP-OS4.gif Polski sygnał kolejowy - świetlna tarcza ostrzegawcza Sygnał Os4 Polish railway signal own work moved from pl-wiki 22 31 4 October 2007 UTC upload on commons Orem wiki-pl Orem commons Orem Public Domain Diagrams of railway signals in Poland | ||||
