| 摘要 |
The invention concerns a sealing top for a liquefied petroleum gas cylinder formed by a cap, comprising a top wall (1) extended by a skirt (2). A tubular portion (3), having a common axis (XX') with the cap (2), starts from the top wall (3) and flares downwards. A protuberance (4) is provided on the skirt (2) inner surface.
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