... /GG30cast level: CT10-CT11sutfaceness: Ra25technique: Clay sand coated sand mold,ectsurface treatment: blasting,spraying plastic, print ... ectequipment: Cupola and electric furnace, mold production line, ... machines laser carving machineSurface treatmentHeat treatment, Polishing, Sand blasting, Painting, Electro-plating, Chemical Plating, ...