Puts forward a smoke control mode of applying smoke-preventing air curtain substituting for ceiling screen and down air flow with velocity no lower than 1.

提出了在楼梯口采用防烟空气幕来代替挡烟垂壁及速度不小于1。

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For a low speed blow down wind tunnel with semi-open test section, the effectiveness of main flow damper in rapidly changing test velocity is verified through experimental research.

通过实验研究证明了用主流阻尼器快速调节半开口直流式低速风洞的实验风速的可行性。

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Results SGB by polarized infrared light could obviously increase the flow velocity and down the resistance index in artery(vs control P< 0.01; vs before P< 0.01);

结果红外偏振光星状神经节阻滞照射可以明显提高患侧上肢动脉血管的血流量、降低血管阻力（P<0.01）；

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