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. 2018 Nov 22;11(12):2351. doi: 10.3390/ma11122351

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© 2018 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) Front face of original (B) back face of original (C) front face of repaired (D) back face of repaired impacted (E) cross-sectional view of repaired composite sample after third impact.