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1 gen 1780 anni - Christian Gottlieb Kratzenstein julkaisi tutkimustyönsä äänenmuodostuksesta, puhekone. Pietari.

Aggiunto al nastro di tempo:

Harmonikan aikajana

ByViljo Mannerjoki
21 dic 2021
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2085

Data:

1 gen 1780 anni
Adesso
~ 245 years ago
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