The paper has discussed the method of synthesis of cationic-type polyacrylamide and it's application as flocculant, retention aid, drainage aid and strength aid.
本文介绍了阳离子型聚丙烯酰胺的制备方法及其在造纸工业中作为助留助滤剂、增强剂、絮凝剂的作用机理和应用条件。
Reducing the size of patios or other paved surfaces will also aid internal drainage.
减少了院子或其他铺设路面也将有助于内部排水的大小。
Many filtration belts have guides on the bottom of the belt to keep the drainage holes centered over the vacuum Chambers or to aid in tracking.
很多带式过滤器在带子底部划有指引线，用以保证排水孔中心在真空室中病辅助跟踪。
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