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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/).
(a) The process of 3D printing of the model of A. beatrix skeleton from PLA using FDM technology; (b,c) general view of the resulting CAD-based simplest cylindrical model; and (d,e) digital microscopy of a designed model wall.