... : within 10 days after order Specifications1. Series of twin-screw bulking machine/extruder is composed of the feeding , extruding , biopsy , ... ensure the safe operation of extruder.4. For different materials, selected single and double screw feeding system, feeding uniform, ... , wearable, anti-fatigue, long life. 6. Different screw diameter ratio structures can meet various requirements of crafts. ...