... 170mm place of origin:shanghai(mainland)brand name:tornadotype:abrasive discsize:300mm,310mm,320mm,```500mmgift:36#-1000#thousand ... , specializing in manufacturing, research and development, sales polishing abrasive products.The production of one hundred films, one thousand ... rounds, belt, grinding head, polishing and other abrasive wheel in the market enjoy a great reputation.Company opened ...