As the relative movement of the tubular member and the magnetic field rotation direction of the rotating surface micro-polishing grinding achieve a desired target rotation pole.
With the relative motion of the tube rotation and the direction of magnetic field rotation, the surface is slightly ground, and the desired rotation altimeratization is achieved.
With the relative motion between the tube rotation and the magnetic field rotation direction, micro grinding is carried out on the surface to achieve the desired goal of rotating magnetic pole grinding.<br>