Assertion: clarinet's bore | /r/HasProperty | about 13.6 mm
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Source sentences:
text: It has a cylindrical bore about 13.6 mm (0.54 in) at the highest measurable point, narrowing to 13.2 mm (0.52 in) between the first and second finger holes, to 12.7 to 12.8 mm (0.50–0.50 in) between the second and third finger holes, and contracting to 11.5 mm (0.45 in) at the seventh hole.