Once they meet with magnets, ferromagnetic materials inside the "small magnets" reordering, same direction, magnetic, and make mutual superposition ferromagnetic materials display macro magnetism.
一旦它们与磁铁相遇，铁磁性物质内部的“小磁铁”重新排序，方向相同，磁性互相叠加，于是使铁磁性物质显示宏观磁性。
These small magnets can free rotation, peacetime its direction desultorily, magnetic mutual offset, the whole object does not show magnetism.
这些小磁铁可以自由转动，平时它们的方向杂乱无章，磁性相互抵消，整个物体不显磁性。
Currently, the small currency counter discriminates the real or fake RMB that mainly has the three detection methods such as the fluorescence, the infrared and the magnetism.
目前，小型点钞机的人民币辨伪主要有荧光、红外和磁性三种检测手段。
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