| 摘要 |
<p>The mechanism comprises a number of pins arranged around the outside of the container, a number of grooves provided on the inside of the cap collar and cooperating contact surfaces on the inside of the cap and outside of the container. The pins and grooves are located in a region which has a round cross-section and defines a central axis and each groove has a locking section for releasably engaging with a pin. The contact surfaces are arranged so that the form an angle relative to each other, those on the container being located at a greater distance from the central axis than those on the cap, so that the cap and container are pressed away from each other in opposite directions.</p> |
