Avoids contacting the radioactive rays and some deleterious substances.
避免接触放射线及一些有害物质。
The results showed that DCS especially dissolved substances(DS) was deleterious to the efficiency of CPAM, and the retention of fine decreased with the increase of concentration of DCS.
结果表明，机械浆中DCS特别是溶解物质DS能够明显降低阳离子聚丙烯酰胺的助留效果，随着DCS浓度的增加，细小纤维的留着率降低。
The results showed that DCS especially dissolved substances(DS) was deleterious to the efficiency of CPAM, and the retention of fine decreased with the increase of concentration of DCS.
结果表明，机械浆中DCS特别是溶解物质DS能够明显降低阳离子聚丙烯酰胺的助留效果，随着DCS浓度的增加，细小纤维的留着率降低。
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