queen post 双柱架

queen post truss [建] 双柱桁架 ; 双柱屋架 ; 双桩屋架

queen-post roof [木] 双柱式屋顶 ; 双柱桁架屋顶

inverted queen post truss 倒双柱桁架

king and queen post truss 立字桁架

reversed queen post girder 反向双柱梁

queen-post girder 双柱托梁

queen post girder 礤柱粱 ; 双柱式梁

queen post roof 双柱式屋顶

queen post roof truss [建] 双柱屋 ; 双柱屋架