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Deutsch-Chinesische Enzyklopädie, 德汉百科
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= Untergrundbahn 地铁,地下铁道;U-Bahnhof (m) 地铁车站;U-Bahn-Wagen (m) 地铁(车辆)
利雅德地铁/قطار الرياض/Riyadh Metro/Riyadh Public Transport Project, RPTP