1.Cooling way: Oil pump; Cooling coil ( internal cooling); Cooler( cooling water jacket) 2.Efficiency transmission, low noise. Single Screw Plastic Extruder Gearbox in HorizontalZLYJ gearbox series are transmission device, which are specially designedfor single-screw extruder with high precision, hard gear surface, accompany with thrust block.Adopting the technical specifications stipulated in JB ...