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duration of blow
met. 持续吹炼时间 (The rate of decarburization as a function of oxygen (available from the lance as well as from the ore) must be known to determine the duration of the blow, so that the heat turns down at the desired carbon level. 脱碳速率作为氧气(包括氧枪供氧和矿石含氧)用量的函数必须为已知条件,以便确定吹炼时间,这样才能在达到预定含碳量时停炉。); 持续吹炼时间