道路隧道指的是为使道路从地层内部或水底通过而修建的建筑物，由洞身、洞门等组成。
厦门市东通道翔安海底隧道是我国在建的首条海底城市道路隧道。
Xia'men east passage Xiang'an undersea tunnel is the first being constructed urban domestic undersea road tunnel.
如果钢是用在使用融雪剂的道路隧道桥或立交桥之下的城市桥梁。
If the steel is used for a low urban-area bridge or overpass that creates a tunnel-like configuration over a road on which deicing salt is used.
季倩倩，总工程师，上海长江遂桥公司《上海沿江道路隧道工程》。
Ji Qianqian, Chief Engineer, Shanghai Yangtze River Tunnel and Bridge.
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