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  • bitdays.co.kr/2021/04/09/dc-dc-%ec%a0%84%ec%9b%90-%ea%b3%b5%ea%b8%89-%ec%9e%a5%ec%b9%98-%ec%8b%9c%ec%9e%a5-%ec%88%98%ec%9a%94-2026-%ea%b8%80%eb%a1%9c%eb%b2%8c-%ea%b0%9c%ec%9a%94-%ed%81%ac%ea%b8%b0-%ea%b0%80%ec%b9%98/ (port 80)