独爱拱桥

老照片看历史

老照片是历史永恒的凝固,“老照片看历史”用永恒的凝固揭开历史的雾霾.

公众号

独爱拱桥

因为美

又实用

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拱桥

archbridge

国内起源东汉中后期

以拱作为结构主要承重构件的桥梁

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