| 摘要 |
A recorded data eraser 1 defines therein a cavity 2 for insertion of a hard disk drive 20 in the cavity 2 and includes a coil 4 being arranged around the cavity 2 so as to encircle the hard disk drive 20 when the hard disk drive 20 is inserted in the cavity 2 , and a DC power supply circuit 8 for producing a magnetic field in the coil 4.
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