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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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13 feb 1920 anni - Crystal Radio invented -Beginning of wireless communications
Aggiunto al nastro di tempo:
comms
By
anirudh
9 ott 2017
0
0
553
Data:
13 feb 1920 anni
Adesso
~ 105 years ago
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