压头差
The tapered diameter design was adopted, in which the whole multiple outlet pipeline consists of pipe segments with different diameters in such a way that the pipeline cost can be reduced on condition that the allowable pressure head difference is satisfied.
在满足多孔管允许压力差的条件下,采用变径设计,即整条多孔管由若干种标准管径的管道组成,可降低多孔管投资。
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