| 摘要 |
PURPOSE: To record and carry almost all information owned by an individual by utilizing a removable hard disk device mountable on portable equipment especially. CONSTITUTION: This hard disk device is held by video equipment 2, 3, 4 and 5 and video data or the like are recorded and reproduced at the data transfer rate of 30 £Mbps| or higher. The capacity of 2 £GB| or more is secured by a hard disk whose diameter is 1.8 inch or less by a so-called sample servo.
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