... machinery, agricultural equipment,electric appliance, electronic fitting, military equipment, etc3. Standard: the dimension tolerance of the product may reach CT3-CT6class4 ... Foundry Spectrovac.8.Surface finish: polishing, oiled(rust-prevented), zinc-plated, nickel-plated, chrome-plated, hot-galvanized, sandblasting, painting, powder-coating,PROCESSMATERIALSTANDARDSANDCASTINGGreen SandGrey Iron ...