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。
The standard sample photograph for features of mulberry doupion silk is an indispensable standard reference in the inspection of the doupion silk.
桑蚕双宫丝特征标准样品（样照）是双宫丝特征检验必备的标准参照物，在制作中有特殊的技术要求。
The certified value of the standard reference material developed is accurate and reliable, and is approved as the national matter standard sample.
所研制的标准物质定值准确可靠，已被定为国家实物标准样品。
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