磁力线的分布情况，严重影响着加工效率。
The distribution situation of the magnetic line influences the efficiency of polishing critically.
不同的永磁体排列结构，磁力线的分布不同，它直接影响电机的效率。
Different arrangement of magnet has different distribution of flux; it will affect the performance of the motor.
将一磁铁放在盒下并将它放在一投影机下面——你即可看到铁粉随著磁力线的分布而移动。
Place any magnet under the unit and set it on an overhead projector-and you will see the filings moving to line up along the lines of magnetic force.
将一磁铁放在盒下并将它放在一投影机下面——你即可看到铁粉随著磁力线的分布而移动。
Place any magnet under the unit and set it on an overhead projector-and you will see the filings moving to line up along the lines of magnetic force.
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