PTFE using conditions industry chemical, and petrochemical, and refinery, and chlorine alkali, and business acid, and p, and pharmaceutical, and pesticide, and chemical fiber, and dye of, and coking, and gas, and organic synthesis, and colored smelting, and steel, and Atomic Energy and the polymer filter material, and high pure products production (as ion film electrolytic), stick heavy material conveying and operation, health requirements height strictly of food, and beverage, processing production sector.