| 摘要 |
A screw-on cap (31) for a recipient including a retention flap (33) and a locking device comprising a first rib and a second rib (16), such that in the first screwing on of the screw-on closure (31) the retention flap (33) is deviated so as to be able to pass between the first rib and the second rib (16) and in the final position, the retention flap (33) butts against a contact surface of the second rib (16) in a secure and reliable manner.
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