冷抽 meaning in English

hard-drawn

In order to gain a better understanding of the mechanism of airflow reversal in a non - diagonal airway of a horizontal network , the relationship and difference between the path integral of the convection item contained in the movement equation and the pressure increase induced by cooling of fume were discussed
为加深对水平网络中非角联旁侧支路风流逆转机理的认识，对运动方程中对流项的沿程积分与冷抽力的联系与区别进行了讨论。
A qualitative analysis and computer simulations show that airflow reversal can occur in a non - diagonal airway parallel to the airway on fire in a horizontal ventilation network due to the pressure increase induced by cooling of fume in the airway connected in parallel to the non - diagonal airway but in series with the one on fire
摘要通过定性分析和计算机模拟发现：在水平网络火灾中，非角联旁侧分支也能发生风流逆转，引起逆转的动力是与该分支并联但与著火分支串联的分支中的冷抽力。