The Tuba
管乐器
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Tuba refers to a family of lip-vibrated, upright, valved, metal wind instruments with a folded tube of wide, conical bore. It was designed to fill an urgent need in brass bands for a satisfactory bass to the valved bugle. Although built in various sizes, only the baritone in B-flat (along with the wider-bored euphonium) and the basses in F, E-flat, CC, and BB-flat survive. 管乐乐器家族中的管钟，是一种通过嘴唇振动、直立、有阀门、金属制的风乐器，其管身呈宽锥形。它最初是为了解决铜管乐队中对满意低音的需求而设计的，以替代阀门号。尽管有各种尺寸的管钟，只有降B调的次中音管（以及管身更宽的 euphonium）和降F、降E调、降C调和降B调的低音管得以保存。
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Out of the experimental development in the 19th century, the lasting changes included the addition of a tuning slide with a weighted balancer, a water valve, additional stays, a receiver pipe for the mouthpiece, and metal alloys and overlays, especially applied to prevent wear in the slide and to reduce friction in movement.
在19世纪的实验发展之后，持久的改进包括添加了一个带有配重平衡器的调谐滑片、水阀、额外的支撑结构、用于口哨的接收管道，以及金属合金和覆盖层，特别是应用于减少滑片的磨损和降低运动中的摩擦。
Brass concepts
Brass instruments
Musical instruments
索引 铝合金概念 铝合金乐器 音乐乐器
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