angle steel

例句：

1. 1. This angle steel is used to support the roof of the building.
   这种角钢用于支撑建筑物的屋顶。
2. 2. The construction crew used angle steel to reinforce the walls.
   施工队使用角钢加固墙壁。
3. 3.The angle steel was designed to be lightweight and durable.
   这种角钢设计轻便且耐用。