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| pouring nozzle (However, the operating experience with the electric ladle preheater has not indicated any problem with inadequate heating of the ladle bottom as evidenced by solidified steel or difficulty in opening the pouring nozzle. 然而，使用钢包电能预热器的操作经验尚未显示出任何可以证明与钢包底部加热不足有关的问题，如钢水凝固或浇注水口难于打开等。) | |||
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