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PREVIEW
... ts were a must within any developed city.
When talking about Radios, there were 2 major factors that come up: frequency and waves (especially Sine waves).
In the modern era, Radio waves control everything.
From the tunes played in cars, to the police radios used for alerting police officers, to the radios within planes....radios waves and frequencies could be seen everywhere.
In fact even cell phones, Televisions, Morse codes, and Walkie Talkies..... u ...
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