名词
中文翻译：发夹式烟道
同义词：
['pipe flue', 'flue pipe']
例句：
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1. Thehairpin flue is a small,curved tube that connects the exhaustfrom a furnace to the chimney.
发夹式烟道是连接炉膛排放和烟囱的一条小弯曲管。
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2. The engineer designed the hairpin flue to improve airflow and reduce emissions.
工程师设计了发夹式烟道，以改善空气流动并减少排放。
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3.The hairpin flue was installed inthe factory's chimney tohelp control pollution.
工厂的烟囱安装了发夹式烟道，以帮助控制污染。