... mould, etc; 2. Free grinding, grinding grade abrasive, applied in tube, optical glass, monocrystalline silicon, glasses, watches and clocks ... particle section type and cutting edge keep degrees, applied in resin grinding tool, the effect principleWant to; 4. Coat ... material; 5. Brown corundum functional filler - mainly used in automobile brake parts, special tires, special building products brought ...