吹氧炼钢用生铁 oxygen steelmaking: 氧气炼钢basic oxygen steelmaking: 氧气碱性转炉炼钢法basic oxygen steelmaking process: 氧气碱性转炉炼钢法oxygen steelmaking process: 氧气炼钢法iron pig: 生铁下载手机词典可随时随地查词查翻译