flanged seam

例句：

1. 1.The flanged seam of the pipe is visible through the wall.
   管道的凸缘焊缝在墙上可见。
2. 2. The flanged seam was made to accommodate the larger diameter pipe.
   凸缘焊缝是为了适应较大直径的管道而制作的。
3. 3. The flanged seam was a weak point in the construction.
   凸缘焊缝是建筑中的薄弱环节。