The Model AS-2 is designed to check velocity and direction of air flow continuously with a smoke tube (No. 301) which reacts with vapour in the air and generates white smoke.
该型号AS - 2的目的是检查速度和方向的空气流动的烟管（301）的反应与空气中的蒸汽并产生白烟不断。
Some key dimensions were confirmed according to the flow balancing theory and the velocity distribution, and a profile-tube die was designed for thermal polyurethane.
依据流动平衡原则，根据流场速度分布探讨了部分关键尺寸的确定。针对热塑性聚氨酯材料进行了异型管材机头的设计。
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