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The magnetic core (1) is made of flexible soft magnetic material.
磁芯（1）由挠性柔软磁性材料构成。
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Material was transformed soft magnetic property into hard magnetic property.
这说明随着球磨时间的增加，材料由软磁性向硬磁性转化。
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Material was transformed soft magnetic property into hard magnetic property.
这说明随着球磨时间的增加，材料由软磁性向硬磁性转化。
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