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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/).
Vibration data of bearing 4 with a developing inner ring fault. (a) The curve of maximum vibration amplitude versus time; (b) vibration signals measured at 500th/1417th/1418th/1460th min.