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1 янв 1870 г. - 1870 Wilmot diseñó un micrómetro que medía milésimas. J.R. Brown y Lucian Sharpe diseñan el primer micrómetro mecánico.

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Metrología

ByErick Piña
12 янв 2018
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1 янв 1870 г.
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~ 155 г назад
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