... 68/143, 70/135, 70/140, 75/150, 80/143, 80/156, 92/188Screw diameter:Φ15mm-Φ360mm L/D=15- ... are the important parts for plastic extruders and injection molding machine,they affect the machine performance and quality directly,therefore,QunYing established quality control ... Counter)5. Twin Parallel screw and barrel Co-rotating,Counter)6. High wear Resistant screw and barrel7. Screw barrel Assembly parts8. ...