Assertion: tuba's valve | /r/CapableOf | control the flow of air
Facets:
value: in the single horn
type: LOCATION
Source sentences:
text: Three valves control the flow of air in the single horn, which is tuned to F or less commonly B♭.
text: The pitch on a horn is achieved by special affixed devices known as valves that control tube length and air flow within the horn.
text: Three valves control the flow of air in the single horn, which is tuned to F or less commonly B♭.
text: Three valves control the flow of air in the single horn, which is tuned to F or less commonly B♭.