... 轨道小车 track trolley 有效运动长度 effective motin length 拖动纸带打点式 pulling paper tape for painting dot ...
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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.
轨道是起重机或小车平稳运行的基础，一般要求每年检查2 ~ 4次。
Track is the foundation of crane or car running smoothly, generally requires checking 2 ~ 4 times every year.
将桥架横放在轨道上或架子上，最好架在于支腿链接用的支承面上，用水平仪测出两端支承面上边的小车轨道的水平标准。
The bridge across the track or on the shelf, the best frame is bearing surface of leg link on the standard level measured at both ends of the bearing surface on the trolley track.
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