open-hearth dust平炉尘
open-hearth practice平炉操作
basic open-hearth碱性平炉
open-hearth iron[冶] 平炉生铁;平炉生铁
open-hearth pig平炉炼钢生铁
acid open-hearth酸性平炉;翻译
open-hearth steelmaking[冶] 平炉炼钢
open-hearth port平炉喷口
open-hearth cinder平炉渣
"open-hearth steel"