High accuracy& friction,fast speed Good wear resistance;long life HV>1000 ... cloth and photo-paper.2. High accuracy, fast speed and high friction (Don't skid, don't work inclined)3 ... abrading to roller in long time working, long life.6. Step-down maintenance repairs charge,boost whole machine tick ... can bite into every kind of paper, ensure site, speed and accuracy, and realize input and output signal of ...