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jan 1, 1870 - 1870 Wilmot diseñó un micrómetro que medía milésimas. J.R. Brown y Lucian Sharpe diseñan el primer micrómetro mecánico.
Added to timeline:
Metrología
By
Erick Piña
12 Jan 2018
0
0
1770
Date:
jan 1, 1870
Now
~ 155 years ago
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