directline直通行directadj.直接的；笔直的；坦白的v.对准；指挥；指示；命令direct-current electric field直流电场Direct Tests and Indirect Tests直接测试和间接测试direct axis transient impedance直轴瞬变阻抗direct air - cooled condenser空冷凝汽器direct current follow up system直流从动系统direct-smelting in converters直接吹炼法direct Euclidean reconstruction直接欧氏重建direct radiographic enlargement直接放大X线摄影(术)direct impedance plethysmograph直接式阻抗容积记录器direct high-voltage discharge直接高压放电