... 次煤烟 subbituminous coal 煤烟含量 soot content 煤烟浓度 soot concentration ...
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Soot Content Standards 烟尘含量标准
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The soot content in the field test oils is measured with the fore mentioned method, which shows good accuracy and repeatability on both new and used oils.
此法可测定新油及旧油中的烟炱含量，准确性、重复性较好。
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