iron smelting短语¹⁴⁴⁹⁷²⁺² 基本例句 炼铁 The second chapter presents the content and characteristic of metallurgy project. It mainly elucidates iron smelting system, steel smelting system and continuous casting system for machine erection. 第二章介绍了冶金工程项目的内容和特点，主要阐述炼铁系统、炼钢系统以及连铸系统设备安装的主要内容。 fabiao