title: The mechanism of the restoration of obliterated serial numbers by acid etching.
mesh_terms: D000143:Acids; D003418:Criminology; D004741:Engraving and Engravings; D008670:Metals; D055095:Optics and Photonics; D013232:Steel
chemical_list: D000143:Acids; D008670:Metals; D013232:Steel