angle flange

例句：

1. 1. The angle flange on the door is perfect for hanging pictures.
   门上的角凸缘非常适合挂画。
2. 2.The engineer carefully measured the angle flange to ensure it was square.
   工程师仔细测量了角度凸缘以确保它平整。
3. 3.The angle flange on the roof of the building provides extra support.
   建筑屋顶的角凸缘提供了额外的支撑。