Few inventions that were designed in the 1870s that have not changed since they were patented, and they are still widely used in the 21st century. Barbed wire is an innovation that fits this category, ...
Insulated microdiameter wire designs can be manufactured reliably down to sizes of around 0.001 in. (0.026 mm). Most applications currently use diameters within the range of 0.0025–0.0075 in. (0.064–0 ...
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