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perpendicular line
bridg.constr. 垂线
construct. 垂直〔正交〕线
tech. 正交线; 垂宜线; 线坠; 铅直线
wind. 垂直线
perpendicular line: 11 phrases in 7 subjects
Bridge construction3
Electronics1
Explosives and Explosive Ordnance Disposal1
Oil / petroleum1
Shipbuilding2
Space1
Technology2