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Документ Precision hard turning of external cylindrical surfaces by rotation procedure(НТУ "ХПИ", 2011) Kundrák, J.; Gyáni, K.; DeszpothThe accuracy of hard turning, the roughness parameters of the turned surfaces are equal to that of grinding or even better. However, the surface topography shows significant divergence. Retaining the extraordinary economic advantages of hard turning, a new version of this procedure has been developed – the rotation turning – which eliminates the deficiencies of the surface topography that cause operation disturbances.