HANGZHOU POLYTECH PLASTIC MACHINERY CO.,LTD Hangzhou POLYTECH plastic machinery co., LTD. is a high-tech enterprise specializing in the research, development, manufacturing, sales and service of plastic extrusion equipment, plastic auxiliary machine and plastic mould. With deep understanding and experience for the plastic compounding and extrusion machine, POLYTECH develops more and more stable, high-advanced and durable qualified machine. For past 25 years, POLYTECH has accumulated abundant