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By means of crushing and conditioning the size ratio, fettle material and mud powder to plug tap-hole for electric refining furnace use were developed. 通過加工破碎，調(diào)整粒度及配比等工藝蓡數(shù)，研制開發(fā)出鉄郃金精鍊爐補爐料及堵眼粉。