perforated pipe

基本解释

The hydraulic calculation of perforated outlet pipe of secondary sedimentation thank has been presented in this paper.
主要介绍了二次沉淀池淹没式穿孔出水管的水力计算方法。
The sonic field transmission matrixes of perforated absorbent pipe is given after the transmission performance of perforated pipe is studied.
本文通过声波在穿孔声管中传播特性的研究，导出了声波在穿孔声管中传播的声场传递矩阵。
Some general methods of dealing with intersection conflict are presented, such as double - well method, square - ditch method, perforated pipe method and return siphon method.
介绍了在处理雨、污水交叉管道交叉冲突时常用的一些方法（如双井法、偏方沟法、多孔管法）等。