电磁波频谱 electromagnet spectrum; electromagnetic spectrum; ether spectrum; spectrum of ..
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电磁波谱;以太波谱
... 尾波谱 coda spectrum 以太波谱 ether spectrum 波谱领域 spectrum ...
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Methods the chemical compositions of the petroleum ether extracts were isolated and purified by chromatographic methods. The structure of acquired compounds was identified by spectrum method.
方法采用多种色谱方法对其含有的化合物进行分离纯化，利用波谱法对得到的化合物进行结构鉴定。
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