... treatments:(1)High, medium, super audio heating quenching(2)Carburizing and seepage nitrogen, metal seeping(3)Electroplating, ... center, CNC machine, and many other auxiliary equipments like friction press, hydraulic press,grinding machine, and milling machines . 5 ... ; sand blastHeat-treatmentThermal refining; high-frequency quenchingMain process equipment1000 tons of friction press, 630 tons of ...