桥梁建设 ... Can an aqueduct be thought as a bridge? 渡槽是否为桥梁呢? Longest bridge across the sea 世界第一长跨大桥——日本明石大桥 The main types of bridge structure 桥梁的主要类型 Beam bridge 梁式桥 Arch bridge拱式桥 Rigid-frame bridge刚架桥 刚架桥 Cable-stayed bridge & Suspension bridge 索承桥 (包括斜拉桥和悬索桥) Combination bridge of different systems 组合体系桥 ...
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