... layer 4,longer lifetime Tairong Machiney Spare Parts of Twin Screw Extruder convenient interchangeability by agile combination ... -cleaning, transmission, compounding, pressure-forming, etc.made of high tool speed W6Mo5Cr4V2, or anti-corrosion steel 38CrMoAlA ... with spare parts for all kinds of extruders; includingscrew elements, linings, melt pumps, screw changers, gearboxes, pelletizers andside ...