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Yamaha Professional Model Bb Cornet YCR-6330 SII
Perfectly rounded tubing results in less turbulence and a smoother air flow,
thus allowing for an excellent scale and reduced resistance.
Hand-lapping pistons and slides ensures an absolutely perfect fit and seal
between the pistons and casings or slide parts. Such a perfect fit helps to
achieve smooth air flow and smooth action and improve the response and
intonation of the instrument.
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