| 摘要 |
<p>Container's open mouht forms a projecting annular collar, divided by a median annular throat into two beads of the same height which cooperate with a closure stopper. The stopper has a top prolonged by an annular tip which enters and peripherally contacts the mouth of the collar, and an outer concentric skirt connected on the under side, by attachments of low mechanical strength, to a ring with two internal mouldings which engage in the lower bead of the collar and in its throat when the stopper completely covers the beads by means of the skirt and ring.</p> |
