sander

名词noun

1. 1A person employed to sand wood.
2. 2A machine to mechanize the process of sanding.
3. 3(rail transport) A device which spreads sand on the rails in wet, snowy, icy, slippery conditions to improve traction.
4. 4historicalA small device resembling a salt shaker but containing sand that was shaken over a document to remove excess ink.