| 摘要 |
<p>The stopper has a screw thread (5) matching the threads on the container (6). The lower part of the stopper has a ring (2) attached to the stopper by breakable lugs (4). The ring is held by a lower flange to prevent it moving upwards on the container. The stopper (1) and the lower ring (2) each have hooks (13,14) side by side when the lugs (4) are intact. When the lugs are broken and the stopper turned the hooks engage, locking the stopper which can be released by counter-rotating the ring.</p> |
