1) 60Mn Forged Grinding Balls and Rolled Grinding Balls (20mm to 180mm)  2) B2 Forged Grinding Balls and Rolled Grinding Balls (20mm to 180mm)  3) B3 Forged Grinding Balls and Rolled Grinding Balls (20mm to 180mm)  4) B4 Forged Grinding Balls and Rolled Grinding Balls (20mm to 180mm) Applied fields 1.Iron mines 2.Rare earth 3.Metal mines 4 Cement plant 5.Power station 6.All kinds of mines 7.Quartz sand mine 8.Chemical industry 9.Molybdenum mineral 10.Building material 11.Refractory industry