Erratum to: Numerical Investigation of the Effects of Structural and Operational Parameters on the Behavior of an Internal Ring Gear Motor and Pump

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The institutional affiliation on page 177 is corrected as follows: 1Faculty of Basic Sciences, University of Transport and Communications No.3 Cau Giay, Hanoi, 10000, Vietnam, [e-mail] 2Faculty of Mechanical Engineering, University of Transport and Communications No.3 Cau Giay, Hanoi, 10000, Vietnam, [e-mail]