处理磁性弱些的矿物和扫选作业，则应采用较强的磁场强度。

Treatment of minerals and magnetic weak some homework, then Saul chose should adopt the strong magnetic field intensity.

youdao

处理磁性弱些的矿物和扫选作业，则应采用较强的磁场强度。

Treatment of minerals and magnetic weak some homework, then Saul chose should adopt the strong magnetic field intensity.

youdao