工字形断面

X-section

semithin section

ultra-thin section

metal-clad, medium-voltage switchboard section

mobile crane with box section jib【机】

of components with a curved cross-section B 65 D 8/00 运输

tangential section

block【铁路】;realm section【计】[专业]磁道的一部分\nsector【计】;segment【遗】