Harden Gear Box 1.Gear reduction boxes 2.Low noise harden gear box 3.Harden gear reducer box Tairong Machiney ZLYJ Harden Gear Box for Plastic Extruder Machine I. Introduction ... rotary direction is changed, please state when ordering. III. Model Type: - ZLYJ112, ZLYJ133, ZLYJ146, ZLYJ173, ZLYJ200, ZLYJ225, ZLYJ250, ZLYJ280, ZLY315, ZLYJ330 ...