1、双柱桁架
...queen post truss ==> 双竖杆桁架queen truss ==> 双柱桁架queen''s metal ==> 奎因合金 ...
queen post truss[建] 双柱桁架;双柱屋架;双柱桁架;双桩屋架
inverted queen post truss倒双柱桁架
king and queen post truss立字桁架
inverted impulse queen post truss倒双柱桁架
queen-post truss双柱桁架
queen post roof truss[建] 双柱屋;双柱屋架