修船中常会遇到铜质舵承出现松动，舵承座孔被腐蚀的情况。
Coppery rudder bush loosen and corrosion of rudder bracket are found frequently when vessel is in repair.
古城大桥是一座下承式单承载面钢管混凝土系杆拱与变截面连续梁组合体系桥梁。
Gucheng bridge is a steel tube concrete bowstring arch and variable cross section continuous beam composite system through bridge with single load plate.
通过一座下承式系杆拱桥的工程实例，应用该模型比较了三种不同的养护方案，验证了该模型的实用性和有效性。
The new model is used in a through tied arch bridge project, with a comparison of three maintenance proposals, and proves applicable and effective.
通过一座下承式系杆拱桥的工程实例，应用该模型比较了三种不同的养护方案，验证了该模型的实用性和有效性。
The new model is used in a through tied arch bridge project, with a comparison of three maintenance proposals, and proves applicable and effective.
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