... away the blot or other dust such as resin, coating material, etc.3). Chemical corrosion resistant, it could resist acid, ... plank coated with copper;4. heat resisting envelope, terrace base-material, enswathing of heat insulation;5. micro wave gasket, oven ... environmental sulfur separating of exhaust gas of electric factory;10. bland compensator, rubbing material, slice of grinding wheel;11. it could be ...