短語(yǔ)詞組短語(yǔ)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 直接還原煉鐵gas -based direct reduction 氣基直接還原fluid iron -ore direct reduction process 鐵礦流化直接還原法 返回 direct reduction