??????? ???????? (coaxial cable)

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• 3) ?????? ??????? ??? ??????? ??????? ??
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  1.0 ??? ??? ?????? ?? ?????? ????? .

3
??????? ???????? (coaxial cable)
4
??????? ???????? (Guided Transmission Media )
5
??????? ??????? (Fiber Optics)
6
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