The lifting power of the yoke was not relative to the magnetic field composed in the workpiece tested, so it could not reflect the magnetizing power of the yoke.
该磁化装置的提升力与其在工件中产生的合成磁场无对应关系，因此不能反映对工件的磁化能力。
2
The regressive formulae of hydrodynamic coefficients relative to clearances, attack angles were given. Three typical interaction regions were divided, defined as Lifting, Mixed and Blocking region.