短語詞組短語generating pitch line 演生節(jié)線generating shape line 產(chǎn)形線generating line of involute 漸開線發(fā)生線;漸開線產(chǎn)生線generating line of surface 曲面的母線heat generating line 發(fā)熱線generating line of a cylinder 柱的母線generating line of a spherical 球面的母線generating line of a conoid 劈錐曲面的母線 返回 generating line