direct steel making 中文意思是什麼
direct steel making
解釋
直接煉鋼-
Industrial test of high speed steel making in electric arc furnace by direct reduction and alloying with tungsten molybdenum vanadium oxide ore
電弧爐鎢鉬釩氧化物礦直接合金化冶煉高速鋼工業試驗
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