Why does the volume of the lining of the furnace wall of the induction melting furnace for melting cast iron become smaller and smaller? - 感应熔炼炉，感应加热炉，感应淬火炉，马弗炉，耐火砖，中国工厂，供应商，制造商，批发商

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Why does the volume of the lining of the furnace wall of the induction melting furnace for melting cast iron become smaller and smaller? - 感应熔炼炉，感应加热炉，感应淬火炉，马弗炉，耐火砖，中国工厂，供应商，制造商，批发商