Spot Welding Electrode, Screw and Barrel for Extrusion, Spare Parts for Extruder manufacturer / supplier in China, offering 50-350mm Parallel Twin Screw Elements for PVDF NMP Production, Bimetallic High-Velocity Mixing Screw Element for PVDF NMP, Bimetallic Alloy Based Wear-Resistant Liner for Abrasive Polymer Extrusion Processes and so on.