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.
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。
The ridge of the gable was designed on the diagonal line and ceilings' height difference was given as if twisting from the south to the north.
山墙脊呈对角线设计，天花板高度不同，就像空间从南面向北面扭曲。
The diagonal current sum or difference of compound bridge has been regarded as output, its quantity can be selected as the larger or the smaller measured variable automatically.
复合桥路采用双对角线复合输出，可以自动选择被测参量中较大和较小者。
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