As which the bell-less top was used in No.3 blast furnace during renewal per iod in 2000.

 
  • 故對3%23高爐在2000年改用無(wú)料鐘爐頂裝置,克服了雙鐘式爐頂的種種缺陷,提高了高爐的利用系數。
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