. 2021 May 21;13(11):1671. doi: 10.3390/polym13111671
© 2021 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 (https://creativecommons.org/licenses/by/4.0/).
Figure 4.
Three-dimensional model on the building tray.