... surface ground 3,electric heavy duty 4,aluminum wheel polish machine HWG 59 could hold 12 pieces of diamond tool at ... , finepolishing, crystallization, preparation, maintenance.Performance:1, The frequency converter could change the motor speed,for meet different requirements of grinding.2 ... disk and velcro, it is very easy and shift to change diamond tools.3, Wet grinding: water tank; Dry grinding: ...