| 摘要 |
A magnetic disk apparatus includes a base body of which one surface is opened, a cover part covering the opened surface of the base body, and a recording and reproducing part provided on the base body and having a magnetic disk and a magnetic head received in a space formed between the base body and the cover part. A convex part is provided along a perimeter of a circumference edge part of one of the base body and the cover part. A first surface of the convex part faces a second flat surface. A packing for sealing is fixed to the first surface of the convex part so as to come in contact with the second flat surface.
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