In the21 st century, BF ironmaking process is still the main process of ironmaking, and intensifying BF smelting is still the main content of technical policy of BF ironmaking.是什么意思_In the21 st century, BF ironmaking process is still the main process of ironmaking, and intensifying BF smelting is still the main content of technical policy of BF ironmaking.在线翻译_英语_读音_用法_例句