| 摘要 |
<p>It consists of a disposable, single-use blank (1) made from a leaktight, flexible and thin synthetic material. This blank (1) has, when viewed flat and from above, the general shape of a diabolo whose upper and lower edges 2 are extended by strips 3 intended to overlap one another at least partially. Those portions of these strips 3 which enter into contact with each other have self-adhesive characteristics which enable them to be stuck together simply by means of pressure.
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