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  • gochangkorea.co.kr/%ec%8b%9c%ec%9e%a5-%ec%a1%b0%ec%82%ac/336189/%ec%83%81%ed%99%a9%ec%9d%b4-iot-%ec%a0%84%eb%ac%b8-%ec%84%9c%eb%b9%84%ec%8a%a4%ec%9d%98-%ec%9d%b8%ed%84%b0%eb%84%b7-industry-2021-%ea%b8%b0%ec%88%a0-%eb%b0%9c%ec%a0%84-%ec%8b%a0%ed%9d%a5-%ed%8a%b8/ (port 80)