sandpaper

I rounded off the corners with sandpaper.

我用纸把棱角打磨光滑。

He rubbed the woodwork down with sandpaper.

他用纸把木结构部分打磨光滑。

Take a piece of sandpaper and round off the edges of the frame.

拿张纸把框架边磨圆。

Burn off the old paint,fill any cracks in the woodwork,and rub down well with sandpaper.

将这件木器原来漆烧掉,填补好上缝,再用纸磨光。