...3-2 描述流体运动的一些基本概念 3-2 描述流体运动的一些基本概念 3-2-1 流管·流束·过流断面·元流·总流： 流管（Stream Tube）：在流场中，任意取一非流线且不自相交的封闭曲线，从这封 闭曲线上各个点绘出流线，组成封闭管状曲面。
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stream tube model 流管模型
transonic stream tube 跨音速流管
bend stream-tube 弯曲流管
Down-stream tube 下降管
stream tube area 流管面积
Firstly, formula of stream tube method was summarized including single disk multi-tube model and double disk multi-tube model.
首先，对流管法计算公式进行归纳总结，包括单盘面-多流管模型和双盘面-多流管模型。
Based on the analysis of the monsoon stream tube of 1983, an attempted is made to develop a short-range forecasting model concerning the rain belt over the Changjiang-Huaihe Valley.
本文企图通过对1983年季风流管的分析，初步尝试为建立一个用季风流管作江淮地区雨带短期预报的模式。
People stream out of the nearby tube stations, the pavements are crowded, and taxis and private cars maneuver into position as they drop theatre-goers outside the entrance to each theatre.
人们从附近的地铁蜂涌而出，人行道很拥挤，出租车、私家车想方设法停到位，把看剧的人送到剧场的入口处。
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