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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 Jan 1895 Jahr - 1895 - The first hearing aid, or "akouphone" was invented.
Zugefügt zum Band der Zeit:
Otto Hahn
By
Robbie Winfield
12 Nov 2019
1
0
401
Datum:
1 Jan 1895 Jahr
Jetzt
~ 130 years ago
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