Zhoushan Zhenyuan Plastic Machinery Co., ltd. is a professional manufacturer engaged in the production of precision screws and glue tubes. Our factory has the abundant technical force, advanced process equipment and first-class production facilities, having more than ten years' experience in screw, plastic tube manufacturing.We introduce advanced technology and craft from Europe and the United States. From all kinds of screw design, alloy spray welding, various specifications single screw taper, parallel twin screw to PVC, EVA, TPR, TR, screw, barrel and other production...