Freudenstein s Theorem is an important theorem for a plane four-bar linkages charac-teristic. Two alternative proofs of the theorem are presented.是什么意思_Freudenstein s Theorem is an important theorem for a plane four-bar linkages charac-teristic. Two alternative proofs of the theorem are presented.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句