记得那时候中国从奥地利买了纯氧顶吹炼钢的专利，降低了生产成本和大大提高了炼钢产量。

来源: chufang 于 2022-11-25 09:01:39 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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