perforated pipe

基本解釋

The hydraulic calculation of perforated outlet pipe of secondary sedimentation thank has been presented in this paper.
主要介紹了二次沉淀池淹沒式穿孔出水管的水力計(jì)算方法。
The sonic field transmission matrixes of perforated absorbent pipe is given after the transmission performance of perforated pipe is studied.
本文通過聲波在穿孔聲管中傳播特性的研究，導(dǎo)出了聲波在穿孔聲管中傳播的聲場(chǎng)傳遞矩陣。
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.
介紹了在處理雨、污水交叉管道交叉沖突時(shí)常用的一些方法（如雙井法、偏方溝法、多孔管法）等。