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  • bitdays.co.kr/2021/03/27/%ea%b4%91%ed%95%99-%eb%ac%b8%ec%9e%90-%ec%9d%b8%ec%8b%9d-ocr-%ec%9e%90%eb%8f%99-%ec%9a%94%ea%b8%88-%ec%88%98%ec%a7%91-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ec%8b%9c%ec%9e%a5-2021-%ec%82%b0%ec%97%85-%ed%81%ac/ (port 80)