... good 2. Rubbing 3. Environmental protection material 4. Anti-corrosion PTFE extruded rods and bars there are two kinds of ... mechanical parts, plastics known, it has the lowest coefficient of grinding Sassafras, the best corrosion resistance and level dielectric ... 10,13,15,161.11000 3.60 SFBN–218,20,25,301.3 0 35,40,45,501.6 0 ... 55,60,65,702100-300 75,80,85,90 2.51000 110,120,1302.5 140,1500 180,200 ...