With historical changes of steel output, total steel energy consumption and steel rolling energy consumption at home and abroad, steel rolling technology progress is illustrated.
通过国内外历年钢铁产量、综合能耗和轧钢工序能耗的变化，阐明轧钢技术进步。
Social economy data contain GDP, total agricultural output, total industrial output, net income per person, education, soil and water conservation projects, and so on.
社会经济数据有GDP、农业生产总值、工业生产总值、人均纯收入、文化教育、水土保持项目等。
Social economy data contain GDP, total agricultural output, total industrial output, net income per person, education, soil and water conservation projects, and so on.
社会经济数据有GDP、农业生产总值、工业生产总值、人均纯收入、文化教育、水土保持项目等。
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