以下为句子列表：
英文: A small French bagpipe operated with a bellows and having a soft sound.
中文: 缪赛特笛一种小型的声音柔和的用手和用吹风器箱演奏的法国风笛
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英文: Abstract: This pater analyzed its heat transfer mechanism and determined the bellows tube to be a type of enhanced heat transfer effective element.
中文: 文摘:通过分析波节管的传热机理，证明它是强化传热的有效元件。
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英文: Extensive bellows seal qualification testing has been performed in the research and development department to prove the bellows cycle life.
中文: 在研究发展部进行的扩展波纹管密封合格测试证明波纹管的使用寿命。
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英文: First of all, the research methods are reduced to three: engineering computational method, analytic method and numerical method, around which, some main achievements in the engineering design and theoretical study on bellows are looked back in detail, the
中文: 将波纹管力学性能研究方法归纳为工程计算法、解析法和数值法，并围绕这3类方法，对波纹管在工程设计和理论研究中的一些主要成果作了较详细的回顾和总结，对各类方法的优劣性和适用范围也作了讨论。
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英文: For 2,000 years, humans—usually boys from a church congregation—squeezed bellows by hand or feet to supply the air, until electric motors and blowers took over.
中文: 长达2000年的时间，都是人类（通常是教堂信徒中的男孩）凭手脚鼓动风箱供应空气，直到马达和鼓风机问世后，情况才改观。
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