https://blog.gongquiz.com/2022/08/06/%ec%a7%81%eb%a5%98-%eb%b6%84%ea%b6%8c%ec%a0%84%eb%8f%99%ea%b8%b0%ec%9d%98-%ec%a0%95%ea%b2%a9%ec%a0%84%ec%95%95-220v-%ec%a0%95%ea%b2%a9%ec%a0%84%eb%a5%98-105a-%ec%a0%84%ea%b8%b0%ec%9e%90%ec%a0%80/