This paper Presents the design of low-head CCM with two smooth continuous straightening areas. Involute is used as continuous straightening curve of first straightening area for the first time.是什麼意思_This paper Presents the design of low-head CCM with two smooth continuous straightening areas. Involute is used as continuous straightening curve of first straightening area for the first time.在線翻譯_英語_讀音_用法_例句