OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 7 5 a b c d e f g h i j k Fig. 5. Comparison of empirical and calculated spectral compositions of natural vibrations of grinding wheel: a – 25А F36 L; b – 25А F46 L; c – 25А F60 L; d – 25А F80 L; e – 25А F120 L; f – 25А F60 N; g – 25А F60 P; h – 25А F60 S; I – 14А F60 L; j – 92А F60 L; k – 64С F60
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