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本文介绍了一种投资少，见效快，操作方便的修复行车主梁上拱度消失的方法。这种方法采用机械的原理，通过拉紧螺栓的拉紧，取得所要求的上拱度。在使用一段时间后，如果发现上拱度减小或消失，可通过调节拉紧螺母使上拱度恢复，安全、方便。由于这种方法所需材料只是普通的圆钢和钢板，而操作起来又只是普通的焊接和拧紧，因此一般厂家都可以实施，不失为修理老、旧行车主梁的一种比较理想的方法。本文向同行们粗略介绍这种方法，供维修老行车时参考。
This paper introduces a method of repairing the disappearance of camber on the driving girder with less investment, quick response and easy operation. This method uses the mechanical principle, by tightening the bolt tension, to obtain the required camber. After using for a period of time, if the camber decreases or disappears, the camber can be restored by adjusting the tightening nut to be safe and convenient. Because this method requires only ordinary round steel and steel plate, and the operation is only ordinary welding and tightening, so the general factory can be implemented, after all, is an ideal way to repair the old, old driving beam. This article to colleagues roughly introduced this method for maintenance of old driving reference.