A new version of face gear drive geometry was proposed as envelopes of two parabolic racks of the pinion and shaper in the profile.是什么意思_A new version of face gear drive geometry was proposed as envelopes of two parabolic racks of the pinion and shaper in the profile.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句