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Profile: Ningbo Tongyong Plastic Machinery Manufacturing Co., Ltd. manufactures plastic injection shaping machines. We are an ISO 9001:2000 certified company. Our plastic injection shaping machines involve plenty of designing options such as normal, middle & high level, and full PC control. Our servo variable frequency energy saving injection molding machine is the environment energy saving precision model machine. Our variable pump drive injection molding machine is a precision and energy-saving series machine which makes the injection molding machine consumers have a wider choice. This type of injection molding machine adopts high responsive proportional variable pump system instead of the traditional constant pump system. It has the ability to adjust and output the flow and pressure needed which makes the pump outputs vary per load changing, avoiding the energy loss from high pressure throttle flow.