... layer Co-extrusion Rotary Die Film Blowing Machine,three layer rotary die film blowing machine.film blowing Name:3SJ-G Series Three ... holding temperature,antihumid,antivreeze,antivreeze,anti-raim,anti-rost,insulation oxygen,oil trsistive,and so used for light and heavy-duty ... -G Series Three layer Co-extrusion Rotary Die Film Blowing Machine