| 摘要 |
<p>The invention concerns a top comprising a base (2) from which axially extends a skirt (4) with an internal thread (6), a substantially circular rib (8) defining a groove (10) produced in the skirt (4) on the top base side, and notches (12) and/or mortises for preventing the top from rotating when it is removed from the cast. The invention is characterised in that the skirt (4) internal thread (6) comes close to the rib (8) without, however, emerging inside it.</p> |
