The forming principle of Niemann worm wheel hob is described, the curved face equation of Niemann worm is deduced, and the normal profile of the worm wheel hob is calculated.是什么意思_The forming principle of Niemann worm wheel hob is described, the curved face equation of Niemann worm is deduced, and the normal profile of the worm wheel hob is calculated.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句