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UKEscape valve
/ɛskˈeɪp vˈalv/
/ɛskˈeɪp vˈælv/Escape valve
[NOUN]1
a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
Examples
1. There'd be no escape valve otherwise, as Weber supposed.
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