... Science & Technology Development CO.,ltd and Zhangjiagang Dehua Machine Co.,ltd occupies an area of 20,000 square ... line consists of the conical twin-screw extruder, a vacuum forming machine, a traction machine, a cutter, etc. The twin-screw extruder and the ... produces plastic pipes,granules,profiles,film ,equipped with the vacuum forming machine,the traction machine,the cutter and the stacking ...