| http://www.w3.org/ns/prov#value | - In other embodiments, other forms of restoring means for restoring the valve member 50 to its closed position may be employed, including, but not limited to a resilient material such as foam rubber, bellows, dome switch-like mechanism, or balloon, or an electromagnet, magnet, pneumatic pressure or the like, located between the valve member and the cup member or other suitable locations.
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