... 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 ... under lacquer-free state, thus it is one new style decorating materials.2.PVC expansion boards ...