铁轨转弯处是倾斜的,火车只能按设计速度行驶,这是为什么?_人民号

铁轨转弯处是倾斜的,火车只能按设计速度行驶,这是为什么?_人民号

Image gallery of Follow The Money: Longview Newspaper Tracks Illegal Payoffs

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