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  • gochangkorea.co.kr/%ec%8b%9c%ec%9e%a5-%ec%a1%b0%ec%82%ac/235166/%ed%98%91-%eb%8c%80%ec%97%ad-%ec%9d%b8%ed%84%b0%eb%84%b7%ec%9d%98-%ea%b2%83-iot-%ec%b9%a9%ec%85%8b-%ec%8b%9c%ec%9e%a5-%ea%b7%9c%eb%aa%a8-%ec%a0%90%ec%9c%a0%ec%9c%a8-2021-%ea%b0%9c%eb%b0%9c/ (port 80)