... virgin bore, to further improve the oil yield.3. Additional virgin bore lead tank back: To avoid extrusion grease ... virgin bore lead tank, rapid separation of the oil and cake, and improve the oil yield.Advantages of oil press:1. ... structure, beautiful appearance, small occupation, durable Technical Parameters of oil hydraulic press: Model Number1685, 1688, 120, 150Screw Diameter78mm, 95mm, 120mm, ...