| 摘要 |
The present invention relates to a system used for safe fixing of caps, valves or similar items to containers, in particular of the type actuated by screwing taps, caps or similar items onto the mouth (1) of a container (S), providing that the removal or uncoupling between the closing/opening device (3) and the said mouth (1) involves the total or partial breakage of a ring (2) placed between the said closing/opening device (3) and the mouth (1).
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