拖挂运输 meaning in English

tractor-trailer transport

As the reinforced concrete highway bridge built in 1960s ? 70s in china , the load - bearing capacity of xingtan bridge is insufficient clue to the increasing traffic and the overloading of trailers and container vehicles . on the other hand , the bridge was wore out and damaged . so , a perfect retrofit scheme needs to be carried out in order to meet both safe and economical demands
同我国六七十年代建造的钢筋砼公路桥梁一样，普遍存在因交通量增大、拖挂运输车、集装箱车辆超载运输等原因造成桥梁承载力不足。加之桥梁老化、破损，迫切需要对旧桥进行技术改造，采用加固补强使其达到既能安全行驶，又节省投资。