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| Posted: 〔追追追小組╱調查報導〕大家有沒有想過一個問題，軌道的軌距是多長？高鐵軌道的軌距跟台鐵的軌距是一樣的嗎？最近，有網友向大甲溪詢問了個很有趣的問題，據說美國鐵軌的軌距寬度，竟是由「馬屁股」決定的？ |
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