timber lattice beam

例句：

1. 1. The timber lattice beams are used to support the roof.
   这些木质梁用来支撑屋顶。
2. 2. The engineer designed a new lattice beam for the bridge.
   工程师为桥梁设计了一种新的桁条。
3. 3. The lattice beams were installed in the building's walls.
   这些桁条被安装在建筑的墙上。