| 摘要 |
2108686 9218794 PCTABS00017 A closure comprises a pair of closure members (14, 15) which when brought together are contained within a body (10) with a sealed space (18) therebetween, means (16) being provided for restraining the members (14, 15) in said body (10), and means (21, 22) associated with the body (10) to introduce a pressurised fluid into the sealed space (18) between the members (14, 15) to cause them to press holdingly against the body (10) and the restraining means (16) thereby to lock the members (14, 15) within the body (10).
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