| http://www.w3.org/ns/prov#value | - xtends into the fluid flow chamber, an integrally-formed peripheral sealing portion including a protrusion directly engageable with a groove of the body to effect a sealing interface therewith, and a movable valving portion having an integrally-formed valve disk engageable with a valve seat of the fluid pressure regulator, said valve disk including two continuous sealing surfaces independent of on
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