Hello Tomoaki San - The Frame of the metro a differnt then a conventionally one, like the Cobra Tram in Zürich, Switzerland As you well observed, This frame allows low heigt between rails and platform. This construction is more expansive but its more confortable for the customer, especially for childrend and old people. Thank you for your kind comment, have a nice week - Mike 工藤
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Photo taken in Cedofeita, Portugal
Misplaced? Suggest new location