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

Zugefügt zum Band der Zeit:

Metrología

ByErick Piña
12 Jan 2018

Datum:

1 Jan 1870 Jahr
Jetzt
~ 154 years ago
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