| 摘要 |
The gas-tight container has a part surface which can become curved, and around which is a continuous bead (3). In the form ready for use, this part surface is concave. The part surface is in the bottom (5) of the container, or itself forms the bottom of the container. The concave curvature in the form ready for use does not extend beyond the outer limits of the bottom edge (2). When the pressure inside is high, at normal external pressure, the concave curvature does extend beyond the outer limits of the bottom edge. |
