从普通排水管系的工作特性出发，分析了硬聚氯乙烯螺旋单立管的工作原理及其优点。
Proceeding with the working character of building drainage system, the principle of PPI is analyzed in the paper.
排水系统采用特殊单立管排水系统，和传统排水系统相比有安装方便、排水性能好等优点。
Drainage system USES single stack drainage systems, drainage systems and traditional compared with easy installation, good drainage performance advantages.
WAB型单立管排水系统属于管件特殊类单立管排水系统，在国内已广泛地应用于工程实际。
WAB single riser drainage system is a special kind of single stand pipe drainage system which has been widely used in engineering practice in our country.
本文主要进行了以下三方面试验研究：第一，稳定压力下UPVC普通单立管、双立管压力波动的模拟试验。
This Paper conducted a pilot study by the following three areas:Firstly, pressure fluctuation experiments of UPVC single pipe, double pipe under the steady pressure condition were conducted.
本文主要进行了以下三方面试验研究：第一，稳定压力下UPVC普通单立管、双立管压力波动的模拟试验。
This Paper conducted a pilot study by the following three areas:Firstly, pressure fluctuation experiments of UPVC single pipe, double pipe under the steady pressure condition were conducted.
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