In addition.It will have much bubble and in pipe after using a period of time. also it makes noisy. all.
还有使用一段时间后管路里水泡很多，噪音很大。
2
In this installation steps that need attention are: pipe with residue inside the bubble must not.
在这个安装步骤中需要注意的是：管路里一定不可以带有残留的气泡。
3
A more detailed multi fluid model was developed with the gas phase divided into several groups according to bubble size to describe bubbly flow in a vertical pipe.