... primary standard pyrheliometer 基准直接日射表 primary standard sample 一级标样 primary standard sound source 原标准声源 ...
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原始标准试样 primary standard sample 工作标准物质 working standard substance ..
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Two primary standard reference fuels, normal heptane and iso-octane arbitrarily assigned 0 and 100 octane number, respectively, are then blended to produce the same knock intensity as the test sample.
两种基准参考燃料正庚烷和异辛烷分别被定义成辛烷值为0和辛烷值为100,将它们混合产生与实验样本相等敲缸强度的爆震。
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