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. 2017 Aug 9;10(8):914. doi: 10.3390/ma10080914

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© 2017 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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Friction testing systems (a) friction-testing device. A: load cell, B: base plate; C: bracket bonded stainless steel plate, D: wire, E: 150-g weight, and F: x-y table. (b,c) bracket-mounting device.