Assertion: snorkel's end | /r/HasProperty | positioned in chamber
Facets:
value: to communicate with fresh air
type: PURPOSE
Source sentences:
text: Once the level of the water trap is cleared and the open end of the device is positioned in chamber 25 to communicate with fresh air, the user can place his mouth on mouthpiece 17 and blow out any small amount of water which may have collected in the device upon insertion thereof through the water trap.