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  • bitdays.co.kr/2021/09/13/%ea%b8%80%eb%a1%9c%eb%b2%8c-igbt-%ec%a0%95%ec%a0%81-%eb%8f%99%ea%b8%b0-%eb%b3%b4%ec%83%81%ea%b8%b0-%ec%8b%9c%ec%9e%a5-%eb%b6%84%ec%84%9d-%ec%84%b1%ec%9e%a5-%ea%b7%9c%eb%aa%a8-%ec%88%98%ec%9a%94/ (port 80)