... impurity profile 杂质分布 impurity selection 杂质选择 impurity semiconductor 含杂质半导体 ...
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Conclusion After impurity removal and concentration by two kind of membrane, Yinhuang medicinal broth lose a little ingredient, so the selection of membrane system is reasonable.
结论银黄水煎液经两种膜除杂、浓缩后，整体成分损失少，膜系统选择合理。
From such 3 aspects as temperature, concentration and impurity, the corrosion causes of stainless steel in WPA are discussed for the selection of materials.
从温度、浓度和杂质3个方面，介绍不锈钢在湿法磷酸中的腐蚀原因。针对这些因素，介绍了选材的原则。
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