Assertion: snorkel's end | /r/HasAspect | a flapper or mushroom valve
Facets:
Source sentences:
text: The distal end of the purge chamber has a flapper or mushroom valve 94 made of an elastomeric member therein.
text: The distal end of the purge chamber has a flapper or mushroom valve 94 made of an elastomeric member therein.