| 摘要 |
<p>A container comprising a side wall or walls, a base and means for sealing the container; the said base including a standing ring on which the container is adapted to stand and a diaphragm portion which extends from the inner edge of the standing ring thus forming a central portion of the base of the container; said diaphragm being adapted to axially deform by bowing either inwardly or outwardly preferentially to the side wall or walls so to accommodate changes in pressure in the container wherein the portion of the diaphragm adjacent to and extending from the inner edge of the standing ring is substantially continuous.</p> |
