https://blog.gongquiz.com/2022/06/22/%ec%98%a4%eb%a7%81o-ring%ec%9d%84-%ec%a0%95%ec%a0%81%ec%8b%a4static-seal%eb%a1%9c-%ec%82%ac%ec%9a%a9%ed%95%a0-%ea%b2%bd%ec%9a%b0-%ec%9e%a5%ec%a0%90%ec%9d%b4-%ec%95%84%eb%8b%8c-%ea%b2%83%ec%9d%80/