| 摘要 |
An obturating device essentially comprising a tear-off cap with a central hole and an elastomer element, characterised in that the tear-off cap (7), provided with a ring with a folded down peripheral edge, covers an internal cap (8) provided with sealing devices in its frontal (20) and side (19) parts, and is furthermore provided, at the periphery of the zone opposite the frontal part (10) of the tear-off cap (7), with a shoulder (23) which cooperates with a central part (25) of overall cylindrical shape which traverses an opening (4) formed in the cover (2) which has to fit over the assembly. <IMAGE>
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