... extruder 2.Smoothing surface,beautiful appearance,innocuity, mildew-free, no cracking and bend PVC board extruder 1.PVC ... calendar. Then smoothing surface, beautiful appearance, innocuity, mildew-free, no distortion, no cracking and bending structure are available ... for ad lettering materials, architecture, decoration materials, door and window of furniture, etc. 3.This production line can produce ...