Design of EC and NC Systems for a New NC Grinder-machine Used to Grind Planar Quadratic and Annular Enveloping Worms是什么意思_Design of EC and NC Systems for a New NC Grinder-machine Used to Grind Planar Quadratic and Annular Enveloping Worms在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句