... Low noise harden gear box 3.Harden gear reducer box Tairong Machiney ZLYJ Harden Gear Box for Plastic Extruder Machine I. Introduction:ZLYJ series ... rotary direction is changed, please state when ordering. III. Model Type: - ZLYJ112, ZLYJ133, ZLYJ146, ZLYJ173, ZLYJ200, ZLYJ225, ZLYJ250, ZLYJ280, ZLY315, ... , electric rollers, Concrete Mixing Plant etc. ZLYJ Harden Gear Box for Plastic Extruder Machine