求翻译：式中μ为磁粒的磁导率，磁力F的方向由dH 的方向确定。这个磁场力不仅产生磁粒对工件表面的压力，也产生使磁粒向加工区域聚集和带动磁粒运动的力。是什么意思？

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In the magnetic particles should be for the permeability, the direction in which the magnetic F dH relative to the direction. Not only from the magnetic field strength of the magnetic particles, the pressure surface of the workpiece to the magnetic particles are also produced to promote the area and

In the formula mu for magnetism grain of magnetic conductivity, magnetic force F direction by dH direction determination.Not only this magnetic field strength produces magnetism grain to the work piece surface pressure, also produces causes magnetism grain to process the region accumulation and the

Μ for magnetic permeability, magnetic f directions determined by the orientation of the dH. Not only the magnetic field force produced magnetic particles on the surface pressure, also makes magnetic abrasive machining led regional aggregation and particle motion of magnetic force.

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