| 摘要 |
A card processor which can substantially reliably prevent magnetic data recorded in a magnetic card and can remarkably enhance security. In the card processor, two radiation sources radiate disturbing magnetic fields outside of an insertion slot. A disturbing magnetic field radiated from one radiation source and a disturbing magnetic field radiated from the other radiation source have different frequencies and intensities. Accordingly, even when a differential head is located at such a position as to be influenced by the disturbing magnetic fields, it is substantially impossible to attain such balance adjustment as to eliminate the influences of the disturbing magnetic fields.
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