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  • bitdays.co.kr/2021/09/12/%ec%97%94%eb%93%9c-%ed%8f%ac%ec%9d%b8%ed%8a%b8-%ed%83%90%ec%a7%80-%eb%b0%8f-%eb%8c%80%ec%9d%91-edr-%ec%86%94%eb%a3%a8%ec%85%98-%ec%8b%9c%ec%9e%a5-2021-2025-%ed%94%84%eb%a1%9c%eb%aa%a8%ec%85%98/ (port 80)