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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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13 fev 1920 ano - Crystal Radio invented -Beginning of wireless communications
Adicionado na linha do tempo:
comms
By
anirudh
9 out 2017
0
0
546
Data:
13 fev 1920 ano
Agora
~ 105 years ago
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