短語詞組短語direct electro -reduction 直接電化學(xué)還原direct -route powder reduction 直接粉末還原semi -direct product reduction 半直積約化direct reduction pro -cess for ironmaking 直接還原鍊鉄gas -based direct reduction 氣基直接還原fluid iron -ore direct reduction process 鉄鑛流化直接還原法 返回 direct reduction