该卡用于存储设备，文本将写在其中的以磁化点为基础的代码上。
The card served as a memory device, on which the text would be written in a code based on magnetized spots.
其方法很简单, 只要对一个点或多个点进行磁化以发挥更大的功效, 然后在其附近放置一个微小的传感器就能检测到它们在电阻下的变化从而得知各点的状态.
Simply magnetise a spot or, more usefully, many spots, and the spots' status can be detected by measuring the changes they induce in the electrical resistance of a tiny sensor placed nearby.
试验结果表明，经磁化处理后铜的回收率分别提高了5~6和2~3个百分点。
The results showed that the copper recoveries increased 5~6 percent points and 2~3 percent points, respectively after magnetic treatment.
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