... Extruder,Two cavity molds,Two Vacuum calibration tank,Double haul off,Double cutter and Double stacker 2.AC motor,ABB frequency speed governor ... times,20 times/min;With strong waste clean device. 9.Double stacker:Equipped with a meter installation, meter size is accurate ... of fees and do not charge service fees.Extruder for Double pipe producing:ModelSJZ-45SJZ-51SJZ-55SJZ-65SJZ-80ISJZ-80IISJZ-92Screw ...