[問題] 軌道問題
各位捷運板的版友大家好
從很久以前就有一個疑問,在淡水線的地面路段常會看到像是以下的鐵軌
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或是只有單邊的
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看起來像是給窄軌的車走的,但是只有一小段而已,
請問這是做甚麼用的?
感謝
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