The municipal railway is 40.85 kilometers long, running through the northern part of Beijing with a shape of inverse "u".
该城市铁路工程全长40.85公里，贯穿北京市北部地区，呈倒“U”字形。
The municipal railway is 40.85 kilometers long, running through the northern part of Beijing with a shape of inverse "u".
该城市铁路工程全长40.85公里，贯穿北京市北部地区，呈倒“U”字形。
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