| 摘要 |
A closure for the opening in open-mouth vessels such as bottles, jars, rocket motor nozzles, casks and the like which includes a plug member and an inflatable ring located near the inner end of the plug. The plug is slid in place in the usual manner and the ring is then inflated to both hold the plug in place in a positive manner and to provide a very effective seal where the ring bears upon the vessel.
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