sander
noun [ C ] uk/ˈsæn.dər/ us/ˈsæn.dɚ/
(also sanding machine)打磨机，磨光器
an electrical machine to which a sheet or disc of rough paper is fastened to rub other surfaces in order to make them smoother
US（防止路面结冰的）撒沙车
a special vehicle that spreads sand on the roads when they are covered with ice
Compare: gritter