scraper excavator

例句：

1. 1.The carpenter used a scraperto smooth the wood surface.
   木匠用刮刀来平滑木材表面。
2. 2. Thepainter used a scraperto remove the paint from thewall.
   画家用刮刀从墙上刮去油漆。
3. 3. The engineer used a scraper to cut through the concrete slab.
   工程师用刮刀切开混凝土板。