使用者用“笔”的底部在纸币上的不同点往返擦拭，指示器的光线显示所经部位是否嵌有磁粉。
Users rub the bottom of the "pen" back and forth across two different spots on a bill, and indicator lights signify whether magnetic particles are embedded in those areas.
使用者用“笔”的底部在纸币上的不同点往返擦拭，指示器的光线显示所经部位是否嵌有磁粉。
Users rub the bottom of the "pen" back and forth across two different spots on a bill, and indicator lights signify whether magnetic particles are embedded in those areas.
应用推荐