研究结果表明，壁面粗糙度对瓦斯爆炸过程的影响很大，相比光滑管道，粗糙管的火焰速度大幅度提高；
The research result shows that the wall roughness has great effects on flame transmission in gas explosion.
重复这个过程，是说的结果，在表面光滑，超出了管道，不管如何粗糙的天气。
The repetition of this process is said to result in a smooth surface beyond the pipeline, no matter how rough the weather.
光滑的表现和非粘附特性保证HDPE管道具有较传统管材更高的输送能力，同时也降低了管路的压力损失和输水能耗。
Smooth performance and to ensure non-adhesion properties of HDPE pipe has a higher than conventional transmission capacity pipe, but also reduces the pressure loss in piping and water consumption.
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