https://blog.faceutil.com/2017/04/06/%ec%9c%88%eb%8f%84%ec%9a%b07-32%eb%b9%84%ed%8a%b8%ec%97%90%ec%84%9c-%eb%a9%94%eb%aa%a8%eb%a6%ac-4gb-%ec%9d%b4%ec%83%81-%ec%82%ac%ec%9a%a9%ed%95%98%eb%8a%94-%eb%b0%a9%eb%b2%95-%e3%81%ae/