https://sdgn.co.kr/%ea%b3%b5%ea%b8%b0%ec%b2%ad%ec%a0%95%ea%b8%b0-%ec%b2%ad%ec%86%8c-%eb%b0%a9%eb%b2%95%ec%82%bc%ec%84%b1-lg-%ec%9c%84%eb%8b%89%ec%8a%a4-%ec%9c%84%eb%8b%88%ec%95%84%ea%b3%bc-%eb%a7%a4%eb%89%b4/ 2020-03-17T22:55:56-07:00 https://www.youtube.com/embed/GM0SFzmSi9g https://sdgn.co.kr/wp-content/uploads/2024/05/공기청정기-청소.webp 68 yes 정보학개론