节流阻力 meaning in Chinese

throttle resistance

Secondly , the paper simplified the calculating model of fume in the high tunnel . took the fume restriction into account , the paper provided some equations to calculate the longitudinal fire ventilation . finally , the paper calculated three examples : the zhongliangshan tunnel and the left route of the yanmenguan tunnel
最后，本文将公路隧道火灾的通风模型进行简化，考虑火灾烟流阻力(节流阻力，摩擦阻力，火风压)的影响，提出了纵向式火灾通风计算的方程式，并对中梁山隧道的左右线、雁门关隧道的右线进行了实例计算。