Product Description Solitary Screw Parallel Shaft Reducer for Plastic Extruder (JHM/ ZLYJ/ ZSYJ)PTT extruder gearboxes have 2 well-known series for 2 kinds screw extruders:ZLYJ/ZSYJ Series Extruder Gear Units for Solitary Screw ExtrudersSZ Collection Extruder...