screw including ¦Õ15-300mm,L/D=20-50,length Max8,000mm various kind of screws & barrels for injection moulding machine and extruder; ¦Õ45/90-92/184mm series conical twin screws & relevant barrels ; ¦Õ45-¦Õ160mm ,L/D=16-25 series parallel twin screws &barrels ;Various kinds of bimetallic screws &barrels as well as production lines .