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The diffraction method is appreciably lower than that of the spectroscopic method. 衍射法的精確度顯然低於光譜法的精確度。
The distillation range of aromatic materials was determined by Raman spectroscopic method. 應(yīng)用拉曼光譜法測定了芳烴物料的餾程。
The relationship between the keyhole behavior and arc light emission flux is studied by spectroscopic method in plasma arc welding of stainless steel. 針對不鏽鋼穿孔等離子弧銲過程，熔池小孔的特征行爲(wèi)與弧光光譜輻射強(qiáng)度之間的關(guān)系進(jìn)行了光譜試騐研究。