A set of formula of conical surface double enveloping worm gearing had been derived and its figures,posi- tion and distribution had been depicted by graphs.是什么意思_A set of formula of conical surface double enveloping worm gearing had been derived and its figures,posi- tion and distribution had been depicted by graphs.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句