hot mill短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 热轧机 This paper analyzed the composition and function of transformer automatic protection system for thin slab hot mill main substation, and introduced its working principle and application detailedly. 本文分析了薄板热轧总降变电所变压器综合保护自动化系统的主保护控制的构成及功能，较详细地阐述了它的原理和应用。 cnki