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Terms for subject Physics containing Group of | all forms | exact matches only | in specified order only
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group of 3 Fraunhofer lines in the yellow of solar spectrum〔太阳光谱黄色部分中一组〕夫琅和费谱线 D (D1 及 D2 谱线波长5890.186埃,D3 谱线波长 5876.618 埃)