Conclusion To infected patients of oral and maxillofacial region clearance, it is important to adopt positive anti-infection combined with surgical incision and drainage.
④结论对重症多间隙口腔颌面部感染患者，应采取积极抗感染与手术切开引流相结合。
2
Positive and negative pressure existed in the upper and lower drainage pipes.
排水立管的上部和下部都存在正压和负压。
3
The study showed that this kind of cationic starch has more positive charges and has good effects on the fibers. It has significant effect on filler retention and drainage in deinked pulp.