N-COUNT In a kitchen, a grinder is a device for crushing food such as coffee or meat into small pieces or into a powder. 食物研磨机
N-COUNT A grinder is a machine or tool for sharpening, smoothing, or polishing the surface of something. 研磨机
disk grinder
盘式研磨机 ; [机] 圆盘磨床 ; 磨圆盘用砂 ; 圆盘磨床