短语词组短语Steel Roof Truss 钢结构屋架;钢屋盖Steel Lattice Truss 钢格构桁架Steel roof truss detail 钢屋架详图;钢屋架steel pipe truss 管桁架tubular steel roof truss 管式钢屋架steel conversion truss 钢转换桁架steel spatial truss 空间钢桁架steel wire truss 钢丝网架 返回 steel truss