Assertion: oboe's bore | /r/HasProperty | narrowed
Facets:
value: extremely
type: DEGREE
value: gradually
type: DEGREE
value: by the standards of the time
type: OTHER
Source sentences:
text: More keys were added during this time and the bore of the wood was narrowed again.
text: The oboe has an extremely narrow conical bore.
text: Stephen Koch (1772-1828) and Joseph Sellner (1787-1843) develop the Viennese style oboe with "a classic appearance with a bore that was extremely narrow by the standards of the time.
text: The bore was narrowed yet again, the walls of the bore made thinner, the tone holes smaller, and consequently, the reed became shorter and narrower.
text: The classical period brought an oboe whose bore was gradually narrowed, and the instrument became outfitted with several keys, among them were those for the notes D♯, F, and G♯. A key similar to the modern octave key was also added called the "slur key", though it was at first used more like the "flick" keys on the modern German bassoon.
text: The Classical period brought a regular oboe whose bore was gradually narrowed, and the instrument became outfitted with several keys, among them those for the notes D♯, F, and G♯. A key similar to the modern octave key was also added called the "slur key", though it was at first used more like the "flick" keys on the modern German bassoon.
text: The oboe has an extremely narrow conical bore.
text: The oboe has a narrow conical bore  with a flaring bell and a double reed mouthpiece made of opposing arc-shaped blades that beat together when producing a tone.
text: Because the oboe has a narrow bore, temperature variations have a lesser effect on its pitch.