| 摘要 |
The fixing devices form a seal over the mouth edge, and have two or more prismatic fixing edges with different dimensions and in different axial positions. They can fit over mouth edges of different shapes and dimensions. Each fixing edge can clamp against the inside surface of the mouth edge, and they can be joined together by steps, or individually secured to the annular structure. A pouring spout (12) can be formed in the peripheral edge (11), which can widen towards the outside. |
