... iron,screening,product grain shape good,no needle and flake,particle no crackle,single grain hardness;In the same time,by ... light,soft impurities,particle surface water cleanness can achieve the effect of sand.Corundum abrasive root According to the size of sand and divided ... resin abrasive consolidation;P sand is used in the manufacturing of the sand paper,sand belts,grinding,polishing,With tools such ...