[化] 打磨

Sand \Sand\, v. t. [imp. & p. p. {Sanded}; p. pr. & vb. n.
{Sanding}.]
1. To sprinkle or cover with sand.

2. To drive upon the sand. [Obs.] --Burton.

3. To bury (oysters) beneath drifting sand or mud.

4. To mix with sand for purposes of fraud; as, to sand sugar.
[Colloq.]

5. To grind down or make smooth by rubbing with an abrasive
object, esp. with sandpaper; to sand down.