UPGRADE AND SERVICE " Extrusion Printing Bag Making Recycling Zipper Paper Bag Machines Woven Machines Blow Molding Upgrade And Service Thickness Measurement UPGRADE AND SERVICE Pellet Extruding Co-Rotating Twin Screw Static Mixing Screws Inflation Counter-Rotating Twin Screw Bimetallic Screws Blow Molding Planetary Screws/Barrels Bimetallic Barrel Sheet Extruding & Laminating Rubber & Plastic Injection