Selling point: Brass material, copper spiral tube body, funnel-shaped mouth, large horn mouth, composed of multiple parts, detachable. Performance skills: The horn can play interchanges and transitions between the two types of sounds. Several color special ways to play "blocking" and "closing" in the mouth of the speaker and the right hand are added. Use maintenance: 1 After the instrument is used up, remove the water in the tube. Because the saliva is acidic, it can reduce corrosion after removal. 2 Because the spring is made of steel wire, it is easy to rust in contact with water. Therefore, after each stroke of the instrument, the spring must be dried with some white oil or sewing machine oil. Finger: B flat major, 1 is not pressed, 2 is 1, 2 key, 3 is 2 key, 4 is not pressed, 5 is 1 key, 6 is 1, 2 key, 7 is 2 key. The treble area 1 is not pressed, 2 is 12 keys, 3 is 2 keys, 4 is not pressed, and 5 is 1 key. (Bass and midrange are the same)
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