Assertion: tuba's valve | /r/CapableOf | isolate entire chambers
Facets:
value: from being active
type: CAUSE
Source sentences:
text: An exception to this is the now-discontinued Hohner XB-40, on which valves are placed not to isolate single reeds, but rather to isolate entire chambers from being active, a design that made playing traditional blues bends possible on all reeds.