1.grey iron, ductile iron, iron alloy 2.hardness: 140HB-260HB 3.competitive price 4.strict QC system, ... running ERP system. More than 40 machining equipments, more than 10 type of testing equipments (include SPECTROMAXX). The area of factory ... and pneumatic parts field: valve, fairlead, gear wheel and piston;2. Machine tool parts: sea saw, guiding rail, worktable and transmission ...