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。
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。
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.
研究表明，高取代度阳离子淀粉带有更多的正电荷，能更好地作用于纤维，对废纸脱墨浆有显著的助留助滤作用；
Apart from the secondary water supply systems, the drainage systems and the air-raid shelters, no significant difference was found in the positive rates between the central area and the marginal area.
除二次供水、市政排水设施和防空洞外，中心城区与边缘城区蚊孳生阳性率无明显差别。
Apart from the secondary water supply systems, the drainage systems and the air-raid shelters, no significant difference was found in the positive rates between the central area and the marginal area.
除二次供水、市政排水设施和防空洞外，中心城区与边缘城区蚊孳生阳性率无明显差别。
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