交流传动技术已成为当今世界上牵引动力高新技术的标志。
Technology of alternating transmission has became the milestone of new technology in the tractive power field around the world.
交流传动技术从其诞生之日起就显示出直流传动无法比拟的优越性。
AC drive technology since it appeared in the world has showed advantage over DC drive technology.
叙述了钢铁工业自动化在DCS、人工智能技术、CIMS、现代控制理论和交流传动技术等方面的进展，以及钢铁工业自动化的发展趋势。
The progress of automation in iron and steel industry in aspects of DCS, artificial intelligence, CIMS, modern control system and AC electric drive is described and the development trend prospected.
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