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ETZ Kreuzung Parkbahn Ringbahn. de Kreuzung der Parkbahn Oberleitungsbus mit der Ringbahn StraenbahnLinie in Bremen Elektrotechnische Zeitschrift Jg Heft Februar author pdold Elektrotechnische Zeitschrift Trams in Bremen Historical trolleybuses Trolleybuses in Bremen Buses with solid tires
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