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hearing aids. (1 ene 1920 año – 1 ene 0 año)

Descripción:

in 1923 Miller Reese Hutchison made the Vacuum tube hearing aids. To make people that can't hear, hear

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ByNicholas Collins
1 oct 2018
3
0
854

fecha:

1 ene 1920 año
1 ene 0 año
~ 10 years

Fotos:

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