railway boxing beam的用法和样例：
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.
摘要铁路箱梁属于工业产品，须取得工业产品生产许可证方可在预制场内进行箱梁的商品化制造和存储。 - The analytic method and results in this paper has reference value to design and construction of box beams of double-track railways.
本文所采用的分析方法和结论对于双线铁路箱梁的设计与施工有一定的借鉴意义。
