n.屋顶盖法，铺屋面
Stone began to be used as a roofing material.
石料开始被用作盖屋顶的材料。
A gust of wind pried loose a section of sheet-metal roofing.
一阵狂风把铺在屋顶上的一块金属片掀起来了。
The roofing slates were laid to overlap each other.
石板屋瓦是相叠着放置的.
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