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. 2020 Mar 25;12(4):733. doi: 10.3390/polym12040733

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© 2020 by the authors.

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 (http://creativecommons.org/licenses/by/4.0/).

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Optical micrographs of the layers thickness of 3D printed parts: (a) P1.4, (b) P1.6, (c) P1.8, (d) P2.4, (e) P2.6, (f) P2.8, (g) P3.4, (h) P3.6 and (i) P3.8 (t = layer thickness, w = extrusion width).