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Treatment and/or coating of parts and materials, including parts and materials of metal, particularly for increasing their resistance to wear, in particular to wear by friction, abrasion and erosion, to fatigue, adhesion, seizure and corrosion; treatment and/or coating of parts and materials, in particular by mechanical, chemical, thermal, thermochemical means, in particular in salt baths, including surface treatment, diffusion treatment, in particular thermochemical diffusion, passivation treatment, treatment by nitriding and oxidation in salt baths; treatment of parts and materials, including parts and materials of metal with oils, lubricants and other organic compositions; information with respect to treatment and coating of parts and materials.