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1 Jan 1870 Jahr - 1.870. Wilmot diseño un micrómetro que media milésima. J. R. Brown y Lucían Sharpe desafían el primer micrómetro mecánico, utilizando los desafíos de Palmer y Wilmot. Joseph Saxton construyo su comparador reflectante

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metrologia

ByJorge guarneros
17 Jul 2020
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Datum:

1 Jan 1870 Jahr
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~ 155 years ago
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