large-andEconomist⁵³⁵⁸¹⁺¹ 例句 We discuss the application of transformer down oil pumps in large-and- medium- scale electric transformers here and demonstrate the design, experiments and applications of electric cooler transformers. 文章阐述了变压器冷却油泵应用于大中型电力变压器及电炉变压器中的设计及试验与应用。 dictall