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二级参考文献2
1Pablo E. Duarte, Edward O. Gerstbrein, A Reliable And Economical Approach For Coal Based DRI Production [ M/OL ]. (2007 -01 -01 ) [2007 - 11 -28]. http://www. hyltechnologres, com.
2Rob. Cheeley, Gasification and The Midrex Direction Reduction Process[ M/OL]. (2005 -06 -30) [2007 - 12 - 01 ]. http :/// www. midrex, com.