Forced cooling air should be used from the beginning of the furnace campaign. 在窑炉作业期开始时就要用空气强制冷却。
The cool type series uses forced cooling fluid that, when passed through the nut, minimizes heat generation and thermal expansion. 凉爽型系列采用强制冷却液，当通过螺母通过，最大限度地减少热量的产生和热膨胀。
