top-slat iron

例句：

1. 1. The top-slat iron is the main support for the roof.
   顶梁铁是屋顶的主要支撑。
2. 2.The engineer used a top-slat iron to reinforce the structure.
   工程师使用顶梁铁来加固结构。
3. 3. The top-slat iron was crucial in ensuring the stability of the building.
   顶梁铁在确保建筑物稳定性方面至关重要。