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  • bitdays.co.kr/2021/04/21/%ec%a7%80%eb%a6%ac-%ec%a0%95%eb%b3%b4-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ed%94%8c%eb%9e%ab%ed%8f%bc-%ec%8b%9c%ec%9e%a5-2020-%ea%b8%80%eb%a1%9c%eb%b2%8c-%ed%81%ac%ea%b8%b0-%ea%b3%b5%ec%9c%a0-%eb%8f%99/ (port 80)