sandpapering

I rounded off the corners with sandpaper.

我用把棱角磨光滑。

He rubbed the woodwork down with sandpaper.

他用把木结构的部磨光滑。

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

拿张把框的边磨圆。

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

将这件木器原来的漆烧掉,填补好上面的裂缝,再用磨光。