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a study of the acoustic characteristics of the object in the u0440u0435u0432u0435u0440u0431u0435u0440u0430u0446u0438u043eu043du043du043eu0439 cell
a study of the acoustic characteristics of the object in the u0440u0435u0432u0435u0440u0431u0435u0440u0430u0446u0438u043eu043du043du043eu0439 cell