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The theoretical and experimental analysis of movement processes of raw cotton on the inclined surface (a tray) is given in the article and different factors influencing cotton cleaning process are studied. Based on developed models, there is an opportunity to determine the efficiency of raw cotton being cleaned under different angles of the inclined plane and the change in its volume. It was observed that pattern of change in coefficient of cotton cleaning efficiency by time as a result of vibration of a tray is closely dependent on compression module and increase in cleaning efficiency was observed.
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