... drainage pipe, electric conduit, etc., conical twin-screw extrusion equipment configuration of tubing, the corresponding mould, auxiliary equipment, ... models: 3.Adopts conical twin-screw extruder features: 4.Adopts unique design of screw, material in barrel inside short ... effect is good, precision temperature control, 6.Adopts screw core temperature control system adopted, Using vacuum exhaust system ...