Assertion: tuba's valve | /r/HasProperty | engaged in conjunction
Facets:
value: with the first valve
type: OTHER
Source sentences:
text: The second valve can only be engaged in conjunction with the first valve, and commonly lowers the key of the trombone to E. With an independent system, the first valve still lowers the key to F, but the second valve commonly lowers the key to G♭ when engaged alone or D when engaged with the first valve.