beam structure的用法和樣例：
例句
- Large span double box-beam rod structure is born out of BSS.
大跨度雙箱梁鋼棒拉杆組合鋼結構即脫胎於張弦梁結構。 - Compared with the railway bridge and culvert design specifications, the box beam structure design and construction method are seen rational and feasible.
通過有限元分析結果與鐵路橋涵設計規範的比較得出，該箱梁結構設計合理，施工方案可行。
