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单词heat efficiency
例句 DEFINITIVE EXAMPLES 权威例句〔Franklin stove〕A cast-iron heating stove shaped like a fireplace but employing metal baffles to increase its heating efficiency.富兰克林壁炉式取暖炉:生铁取暖炉,形状象火炉,但用流板来增强加热效力美国传统
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