https://blog.gongquiz.com/2021/10/14/%ec%a0%84%eb%8f%99%ea%b8%b0%ec%9d%98-%ec%b6%9c%eb%a0%a5%ec%9d%b4-15kw-%ec%86%8d%eb%8f%84-1800rpm%ec%9c%bc%eb%a1%9c-%ed%9a%8c%ec%a0%84%ed%95%98%ea%b3%a0-%ec%9e%88%ec%9d%84-%eb%95%8c-%eb%b0%9c%ec%83%9d/