...、砖石、棉秆、棉叶、草杂和异性或异色纤维（俗 称“三丝”）等，HVI 是根据杂质数（TC）与杂质面积 （TA）定杂质级（Tr Grade）的。 在各种杂质中，异性（色）纤维对纺织的危害最 大。
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杂质能级 [电子] impurity energy level ; impurity level,impurity level
深度杂质能级 Deep impurity level
施主杂质能级 donor impurity level
受主杂质能级 acceptor impurity level
杂质等级 Trash Grade
深能级杂质 deep level impurity ; deep energy level impurity
浅杂质能级 shallow impurity energy level
杂质和纯度等级 Contaminants and purity classes
采用大口径石英毛细管柱分析聚合级丙烯中的烃类杂质。
The hydrocarbon impurities in propylene was determined by using big-caliber quartz capillary column.
发现采用商业级钆配制合金时，由于杂质抑制了材料的一级相变，未发现巨磁热效应。
The first order phase transformation in the samples made of commercial Gd was destroyed by impurities, and no giant magnetocaloric effect was found.
本文介绍了聚合级乙烯和丙烯中烃杂质的分析方法。
The paper describes the analytical methods of trace level hydrocarbon impurities in pure ethene and propene.
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