| 摘要 |
A magnetic recording apparatus in which a stationary magnetic recording strip ridges over a rotating drum on a cushion of air. Magnetic heads are located at the surface of the drum, for reading, writing, and erasing information on the magnetic strip. Both vacuum and positive air pressures are used to achieve spacing control between drum and strip. The vacuum pulls the strip down closer to the magnetic heads and the positive air pressure restores the strip to its previous flying height.
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