Labels:airplane | bannister | trolleybus OCR: The Trombone AND RELATED INSTRUMENTS ROMBONES are brass instruments with iong cvlindrical tubes, flared bells, and cup-shaped mouthpieces Most trombones have slide that the player uses alter the length of the tube and change the pitch, but some have valves TROMEOHE VALVE TROMBONE SACKBUT long cylindrical moutl thpieces TROMEONE
(.png)
