04/12/14 06:52:14 OnCqe1Xb
>>579
This beautiful, Chrome Plated 4 Valve Euphonium comes complete with a FREE mouthpiece and a beautiful FREE soft carrying case made of imitation leather .
The function of the 4th Valve is to alter the key from Bb to F.
This is a compensating horn.
メーカーはこんなこと書いてますが・・・。