large span frame 大跨度框构

prestressed large span frame 预应力大跨框架

large-span skew frame 大跨度斜交框架

large span portal frame 大跨度门式刚架

large-span space frame system 大跨度空间框架体系

large span steel grid-frame structure 大跨度钢网架结构

large-span continuous rigid-frame bridge 大跨连续刚构桥

large-span oblique crossing Frame Bridge 大跨度斜交框构桥