心包络，简称心包，亦称“膻中”，是包在心脏外面的包膜，具有保护心脏的作用。心包络既是心的外围，故邪气犯心，常先侵犯心包络。
介绍了异形螺杆数控铣削加工中应用无瞬心包络原理的理论与实践。
This paper introduces a principle and practice on milling special shaped spiral rod with non instantaneous pole envelope method.
异形螺杆的加工一般采用成型法及无瞬心包络铣削方法在专用数控铣床上进行。
The special screw is manufactured with the molding method and non-instantaneous envelope method on the numerical control millers generally.
应用推荐