Assertion: piano's mechanism | /r/CapableOf | come into widespread use
Facets:
value: in the 20th century
type: TEMPORAL
Source sentences:
text: The mechanism that finally came into widespread use in the 20th century was all-pneumatic, with foot-operated bellows providing a source of vacuum needed to operate a pneumatic motor driving the take-up spool while each small inrush of air through a hole in the paper roll was amplified in two pneumatic stages (the so-called double valve mechanism) to sufficient strength to strike a loud note.
text: The mechanism that finally came into widespread use in the 20th century was all-pneumatic, with foot-operated bellows providing a source of vacuum needed to operate a pneumatic motor driving the take-up spool while each small inrush of air through a hole in the paper roll was amplified in two pneumatic stages (the so-called double valve mechanism) to sufficient strength to strike a loud note.