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一種穿越河川的橋梁形式,多用於正常水位與洪水來臨時的高水位落差較大,且無通航需求的河川上 来自维基百科,自由的百科全书
潜水桥(submersible bridge)又称沉下桥,是一种开启桥,当有船只通过时,这种桥的桥面会沉入水面以下,船只通过以后桥面会再次升起让车辆行人通过。相对于其他的开启桥,其优点是对船只的高度没有限制,但对吃水深度有限制。
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