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  • bitdays.co.kr/2021/02/17/%ec%a0%88%ec%97%b0-%ea%b2%8c%ec%9d%b4%ed%8a%b8-%ec%96%91%ea%b7%b9%ec%84%b1-%ed%8a%b8%eb%9e%9c%ec%a7%80%ec%8a%a4%ed%84%b0-igbt-%ec%8b%9c%ec%9e%a5-%eb%b3%b4%ea%b3%a0%ec%84%9c-%ed%81%ac%ea%b8%b0/ (port 80)