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首页 - 英汉词典 - U字开头的单词或词组 - useful life

英语解释

useful life

汉语翻译

【化】有效期; 使用寿命
【经】可用年限, 有用寿命

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useful-life estimated useful life be very useful at be useful to useful/useless production useful vacuum degree useful time useful load useful length useful density range useful cross section useful area

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