扼要介绍了特殊管件在PDS中的建模方法。
In this article, the methods of building model for special fittings in PDS were introduced.
下部特殊管件设计，消除水舌、水塞、水壅等现象，保持立管内空气畅通，有效保证管道内的压力平衡，可大幅度提高系统的排水能力。
Upper and under connection design which avoid water block, keep air smooth in the pipe, sure the pressure balance in the pipe, is good to improve drainage ability.
也办理特殊配管和认定零部件。
We also accept special piping and tubing requests, and carry regulatory certified parts.
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.
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.
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