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  • bitdays.co.kr/2021/10/29/5g%eb%a5%bc%ec%9c%84%ed%95%9c-rf-%eb%a7%88%ec%9d%b4%ed%81%ac%eb%a1%9c-%ec%9b%a8%ec%9d%b4%eb%b8%8c-%ed%8c%8c%ec%9b%8c-%ed%8a%b8%eb%9e%9c%ec%a7%80%ec%8a%a4%ed%84%b0-%ec%8b%9c%ec%9e%a5-2021-2027/ (port 80)