... grinding ,polishing ,sanding KMJ-2708 diamond abrasive flap wheel place of origin:dongguan ,china( ... mainland)type:abrasive flap wheel brand name:KMJ usage:grinding ... economicThe superabrasive diamond and cbn sand paper products( abrasive belts, block, discs, pads, bands) are ... or CBN, and some other bond materials, resin bond with each other and then electroplated to ...