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Description:Types of speed reduction box of conical twin screw extruder: SZ45/90-φ45/97, 50/103, 55/110, 65/120, 65/132, 68/146, 80/156, 80/172, 92/188 Material and performance of speed reduction box's gear: 20CrMnTi, which is carbonization, quenching, gear grinding and low noise (no more than 85Db), it adopts imported NAK windtight circle and no oil leak; imported Japanese NSK bearing has a long lifespan