这座桥有七个弯拱。
他们设计的公路还有轻微的路拱或弯拱曲线，便于路面排水。
Their roads were also slightly curved in a crown or camber so that the water would run off.
安装前要对起重机安装跨度，金属结构主梁的拱度、水平旁弯，小车轨道高低差、轨距偏差，桥架对角线等进行测量。
To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.
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