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将过筛后的金属试料通过选定筛网在模具中压成圆片状丸子试样，直接在光电直读光谱仪上进行分析。所得数据偏差小于0．003，优于化学分析法测得结果。
The sieved metal sample through the selected mesh in the mold pressed into pellets pellets, direct optical direct reading spectrometer for analysis. The deviation of the obtained data is less than 0.003, which is better than the result of chemical analysis.