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1979年推广冶炼低硅、低硫生铁的先进经验(冶金部30条行之有效的先进经验之一)以来,重点企业高炉生铁含硅量由0.85％降低到
Since the promotion of advanced experience in smelting low-silicon and low-sulfur pig iron (one of 30 well-established advanced experiences in the Metallurgy Department) in 1979, the silicon content of pig iron in key enterprises decreased from 0.85% to