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风口回旋区
met. tuyere raceway (zone); raceway (【技】高炉冶炼时,当鼓风动能达到一定的程度后,炉内风口前焦炭在高速热风的作用下边做回旋运动边燃烧,形成了一个疏散而近似球形的空间区域。: The region is called a raceway because of the rapid recirculation of coke particles within this cavity, or void. 这一区域之所以称之为焦炭回旋区,是因为焦炭颗粒在这一空腔或空窝内做高速循环运动。); raceway zone