Hence, for improving the uniformityof air supply and the performance of the duct, it is of great importance to studythe rules of resistance distribution in static pressure air supply duct.
研究静压送风道的阻力分布规律，对提高送风均匀性和改善送风道性能有重要意义。
On the base of both consideration of heat transfer performance and resistance, the optimization and research are carried out on single spiral duct double pipe condenser.
本文在综合考虑传热性能和摩擦阻力等因素的基础上，对单螺旋槽套管式冷凝器的结构进行了优化和研究。
A method is presented for calculation of air resistance in melt - spinning quench duct.
介绍纺丝吹风窗的阻力计算方法。
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