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Methods Ultraviolet spectroscopic method was used.
方法采用紫外分光光度法。
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The diffraction method is appreciably lower than that of the spectroscopic method.
衍射法的精确度显然低于光谱法的精确度。
The distillation range of aromatic materials was determined by Raman spectroscopic method.
应用拉曼光谱法测定了芳烃物料的馏程。
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