railway boxing beam的用法和樣例：
例句
- As the box beams are industrial products, so it is necessary to obtain a permit before they can be fabricated and stored in a prefabricating yard.
摘要鐵路箱梁屬於工業產品，須取得工業產品生產許可證方可在預製場內進行箱梁的商品化製造和存儲。 - The analytic method and results in this paper has reference value to design and construction of box beams of double-track railways.
本文所採用的分析方法和結論對於雙線鐵路箱梁的設計與施工有一定的借鑒意義。
