The mechanical structure and working principles of a kind of rolling tool for spiral groove tubes are introduced, and the geometrical parameters of normal spiral groove tubes are provided.是什么意思_The mechanical structure and working principles of a kind of rolling tool for spiral groove tubes are introduced, and the geometrical parameters of normal spiral groove tubes are provided.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句