extremely low frequency, the band of radio frequencies from 3 to 30 hertz

listen to the pronunciation of extremely low frequency, the band of radio frequencies from 3 to 30 hertz
الإنجليزية - الإنجليزية
ELF
extremely low frequency, the band of radio frequencies from 3 to 30 hertz

    الواصلة

    ex·treme·ly low frequency, the band of ra·di·o frequencies from 3 to 30 hertz

    النطق

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