... rubber screw extruder with pushing package. All technical specifications of product design refer to JB/T8853-2001 "Cylindrical gear ... both positive and negative direction, but high-speed shaft of some models is equipped with one-way oil pump, so its ... ; - ZSYJ450, ZSYJ560, ZSYJ630We also have many other different types of products, including reducers, motors, chains, electric rollers, Concrete Mixing ...