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. 2020 Mar 7;13(5):1207. doi: 10.3390/ma13051207

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© 2020 by the author.

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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SEM micrographs (magnification: 6000×) of vinyl-ester composites with various contents of fly ash FA_F: (a) composite with 21% content of fly ash in the microfiller (ID: No. 3 acc. to Figure 5); (b) composite with 79% content of fly ash in microfiller (ID: Np. 7 acc. to Figure 5)