... plastic, rubber screw extruder with pushing package. All technical specifications of product design refer to JB/T8853-2001 "Cylindrical gear ... and shaft parts. The gears are processed by technique of carbonization, quenching and grinding. The gears’ accuracy ... - ZSYJ450, ZSYJ560, ZSYJ630We also have many other different types of products, including reducers, motors, chains, electric rollers, Concrete ...