| 摘要 |
<p>The stopper (1) has a thread (11) on its inner wall which is screwed on complementary threads (22) on the outside of the container neck (2). The threads are formed by helicoidal ribs whose section comprises slots (c) which receive thread sections (t) forming the threads. These ensure the axial retention of the stopper on the neck when in the intermediate opening and de-gassing position.</p> |
