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1 gen 1870 anni - 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

Aggiunto al nastro di tempo:

metrologia

ByJorge guarneros
17 lug 2020
0
0
548

Data:

1 gen 1870 anni
Adesso
~ 155 years ago
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