本文阐述了若干种计算塑料管水力阻力的方法。
This paper describes some points of view for computing the friction of plastic tubes.
本文利用废气治理工程中测试的数据，建立了流化填料净化塔的水力阻力经验式。
By making use of the available data from engineering experiment, an empirical formula to estimate pressure drop of fluidized packing contactor has been set.
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