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second valve slide /ˈsɛkənd ˈvalv ˈslaɪd/ n

中文：第二活塞滑管

中文 · 第二活塞滑管Español · segundo pistón móvilFrançais · coulisse du deuxième piston
Meaning：Curved tube that, when the second valve is pressed down, lowers the note by a semitone.
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Trumpet

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