高炉炉顶(① In blast furnace operations, pelletized iron ore, coke and other materials are introduced at the top of the furnace. 在高炉操作中,铁矿石球团、焦炭和其他原料从炉顶装人高炉。② Bell and hopper is a charging apparatus at the top of a blast furnace and so devised that the raw materials can be fed into the furnace while the escape of gas is prevented. 料钟和料斗是一种高炉炉顶装料设施,如此设计可将炉料装人炉中,而又能避免炉顶煤气逸出。)
结晶器铜板上口(Mold thermocouples are placed at two depths in the mold, 7 inches from the top of the mold copper and 17 inches from the top of the mold copper. 结晶器热电偶埋设在结晶器两个深度的位置上:一处位于距结晶器铜板上口 7in 处,另一处位于距结晶器铜板上口 17in 处。)