| 摘要 |
In combination a data-carrying disc (1) having a data-carrying portion (2) and a data-free inner portion (3), and an axially aligned disc-shaped cover (11) comprising an inner adhesive-carrying portion (13) and an outer adhesive-free portion (12), the cover (11) being so aligned that the inner adhesive-carrying portion adheres to the data-free portion (3) of the disc and the outer adhesive-free portion(12) is in contact with the data-carrying portion (2) of the disc (1), characterised in that the disc (11) is a single, unitary whole and is of a thickness and material such that the adhesive-free portion (12) is maintained in contact with the data-carrying portion (2) of the disc only by the inner adhesive-carrying portion (3), and by the surface contact between the adhesive-free portion (12) and the data-carrying portion (2) of the disc (1).
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