pile grating

例句：

1. 1. The old house had a beautiful wooden roof with a piled grating.
   这座老房子有一个漂亮的木制屋顶，上面堆满了格栅。
2. 2.They used to build their houses with stacked gratings instead of bricks.
   他们过去建造房屋时，会使用堆叠的格栅而不是砖块。
3. 3. The carpenter carefully placed the piled gratings on the roof.
   木匠小心翼翼地将堆叠的格栅放在屋顶上。