amateur radio

基本解释

When he was young, he boxed, fished, did amateur radio and belonged to fraternities.
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More than 70 of these OSCARs — for Orbiting Satellite Carrying Amateur Radio — have been launched and some have a limited data networking capability for text messaging.
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It carried a total of six picosatellites: the Aerospace pair plus four others, three of which were built by students at Santa Clara University and one by amateur radio enthusiasts.
ECONOMIST: Picosatellites