Spot Welding Electrode, Screw and Barrel for Extrusion, Spare Parts for Extruder manufacturer / supplier in China, offering Customized Conical Screw and Barrel for Calcium Carbonate Content 75%-85% Production, Biemetallic Conical Twin Screw and Barrel for PVC WPC PE, Wear Resistant OS65 Nickel-Based Tungsten Carbide Liner for Klithium Battery Slurry and so on.