For avoiding the diffusion of the gas containing bacteria in the tube of the respirationapparatus to pollute the air in ward and make the cross-infection.
为防止呼吸机呼气管道中的含菌气体扩散污染病房空气，引发交叉感染。
2
The study on the biomass, respiration and P/B coefficient of benthon have been carried out with counting method, sealed apparatus method and cultivation method in Sanjiang Plain.