炉帽 meaning in English

tunnel head

The company produces two kinds of repairing materials for converter lining . one is gunning material for converter crown , trunnion and slag line and the other is repairing materials for two large working faces in the converter . they are the best gunning materials for converter ' s maintenance and repairing
本公司生产二种转炉炉衬用修补料，一种是用于炉帽、耳轴、渣线的喷补料，一种是用于两个大面的修补料，是转炉维护和投补用的最佳材料。