名词
中文翻译：下火炉
同义词：
['down-draft furnace', 'down-compressionfurnace']
例句：
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1. Down-fired furnaces are used for heatingbuildings in cold climates.
下火炉用于寒冷气候中供暖建筑物。
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2. The down-fired furnace is designed to producehigh-quality steel.
下火炉设计用来生产高质量的钢材。
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3. Down-firedfurnaces are more energy-efficient thantraditional furnaces.
下火炉比传统炉子更节能。