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. 2019 Oct 15;12(20):3352. doi: 10.3390/ma12203352

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© 2019 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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(a) Load-deflection curves of F1PU specimens during repeated loading test including static test results after one million cycles. (b) A detailed view of the first initial deflection 2.5 mm.