In order to deeply study the electromagnetic field, first we must measure the magnetization characteristic of magnetic material with high accuracy.

为了能够更加深入的对电磁场进行研究，首先必须能够精确的测量出磁性材料的磁化特性。

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In order to deeply study the electromagnetic field, first we must measure the magnetization characteristic of magnetic material with high accuracy.

为了能够更加深入的对电磁场进行研究，首先必须能够精确的测量出磁性材料的磁化特性。

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