This method not only saves many work and time spended on radking girders,but also saves many and many material costs.In the same time,it can avoidance many unsafe factors created from the end serv...

• 不仅可省去大量的架棚套棚工时,而且可节省材料费用,同时可增加端头维护工作的安全性,大大提高了劳动效益,有很好的经济和社会效益。