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  • bitdays.co.kr/2021/03/03/hvac-%ec%84%bc%ec%84%9c-%eb%b0%8f-%ec%bb%a8%ed%8a%b8%eb%a1%a4%eb%9f%ac-%ec%8b%9c%ec%9e%a5-%ea%b0%9c%ec%9a%94-%ea%b8%b0%ed%9a%8c-%ed%8a%b9%ec%a7%95-%ec%9e%a5%ec%a0%90%ec%9d%98-%eb%b6%84%ec%84%9d/ (port 80)