并且随着管径的增大，管道断面上管轴中心流速和管壁流速的差值将随之增大。
Besides, as the diameter increases, the velocity difference between pipeline axis and wall will become bigger accordingly.
圆形断面管道在工程中的应用十分广泛。
The pipelines with circular section are used widely in the practical engineering.
本文阐述了通直等断面主管道式通用型气力吸集装置的结构、工作原理、设计计算方法及使用特点。该系统适用于大型木材加工车间。
The article describes structure, working principle, design method and characteristics of general pneumatic dust collecting device with equal section main pipe for largescale wood processing mills.
研究输气管道小断面隧道的地震动力响应有着重要的工程应用价值。
To study seismic dynamic response of gas pipeline small cross-section tunnel has important value of engineering application.
管道系统的水力过渡过程通常是采用一维理论进行计算的，因此实际的三维管道通常采用沿中心线延伸变成具有相同过流断面的等效直管来代替。
Hydraulic transients in piping systems are usually calculated by one-dimensional theory, in which real 3-d piping is replaced, by an equivalent straight conduit with the same cross section.
管道系统的水力过渡过程通常是采用一维理论进行计算的，因此实际的三维管道通常采用沿中心线延伸变成具有相同过流断面的等效直管来代替。
Hydraulic transients in piping systems are usually calculated by one-dimensional theory, in which real 3-d piping is replaced, by an equivalent straight conduit with the same cross section.
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