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(a) Wavy elasticity conductors with various design parameters. Reproduced with permission from [18]; published by John Wiley and Sons, 2004. (b) Horseshoe-like wires by a multi-track design. Reproduced with permission from [19]; published by IEEE, 2007. (c) Mechanical behavior of a “self-similar” design of routing stretching from 0% to 300% of strain. Reproduced with permission from [13]; published by Nature Publishing Group, 2013.
