A part that operates by sliding, as the U-shaped section of tube on a trombone that is moved to produce various tones.
型滑管：靠滑动操作的部分，如长号上u型的管子部分，拉动它可以产生各种声调。
A part that operates by sliding, as the U-shaped section of tube on a trombone that is moved to produce various tones.
型滑管：靠滑动操作的部分，如长号上u型的管子部分，拉动它可以产生各种声调。
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