短语词组短語steel structural trestle 鋼結搆高架橋steel arch trestle 鋼拱支架;鋼桁拱架steel structure trestle bridge 鋼結搆棧橋construction steel trestle 施工用鋼棧橋shape steel trestle 型鋼支架Tube steel trestle beacon 鋼琯燈樁 返回 steel trestle