名词
中文翻译：倒流阀
同义词：
['reverse valve', 'backflow valve例句：1. The blow-down valve is used to prevent the flow of water from a pipe when it is not in use.（倒流阀用于防止管道在不使用时水流。）2. The engineer replaced the blow-down valve with a more efficient model.（工程师用一个更有效的模型替换了倒流阀。）3. During maintenance', 'the technician had to check the blow-down valve to ensure it was working properly.（维护期间，技术人员必须检查倒流阀以确保其正常工作。）']
例句：
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1. The blow-down valve is used to prevent the flow of water from a pipe when it is not in use.
倒流阀用于防止管道在不使用时水流。
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2. The engineer replaced the blow-down valve with a more efficient model.
工程师用一个更有效的模型替换了倒流阀。
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3. During maintenance, the technician had to check the blow-down valve to ensure it was working properly.
维护期间，技术人员必须检查倒流阀以确保其正常工作。