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which communication channel is used by …

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which communication channel is used by landline telephones?

    • Posted by Prabha Thakur 6 years, 11 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Mehak Gupta 6 years, 11 months ago

    Satellite wave

    1Thank You

    Reshmi Priya 6 years, 11 months ago

    Surface wave

    0Thank You

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