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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/).
The electromechanical properties of various strain sensors. (a) The relationship between the resistance variation and strain with various pre-strains. (b) The resistance and the maximum endurable strain comparison of various strain sensors with different pre-strains.