Assertion: piano's mechanism | /r/CapableOf | force the jack
Facets:
value: against knuckle
type: MANNER
value: against the hammer roller
type: MANNER
Source sentences:
text: First, the key raises the "wippen" mechanism, which forces the jack against the hammer roller (or knuckle).
text: First, the key raises the "wippen" mechanism, which forces the jack against the hammer roller (or knuckle).