https://blog.gongquiz.com/2021/04/04/dial-gauge%eb%8a%94-%eb%8b%a4%ec%9d%8c-%ec%a4%91-%ec%96%b4%eb%8a%90-%ec%b8%a1%ec%a0%95-%eb%b0%a9%eb%b2%95%ec%97%90-%ec%86%8d%ed%95%98%eb%8a%94%ea%b0%80-%ea%b0%80%ec%8a%a4%ec%82%b0%ec%97%85%ea%b8%b0-2/