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Radio wave
Radio wave is an electromagnetic wave of a frequency between about 10 4 and 10 11 or 10 12 Hz , as used for long distance communic...
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Radio wave is an electromagnetic wave of a frequency between about 10 4 and 10 11 or 10 12 Hz , as used for long distance communic...
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Hi I am sohendra and I am going to share the experience about 1 day with police. We went to school at regular time.2076/2/16.There were two...

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