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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Frequency characterization of the cell mixing device (CMD), by varying the voltage applied to the gear motor with (blue square) and without (red circle) the conrod. If not visible, error bars are smaller than the data points.