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平面角 píngmiànjiǎo
math. angle between two straight lines; plane angle
平面角: 72 phrases in 16 subjects
Air defense1
Architecture2
Aviation2
Construction1
Drilling3
Earth sciences2
Electronics5
Explosives and Explosive Ordnance Disposal3
General3
Geophysics1
Hydroelectric power stations1
Oil / petroleum3
Shipbuilding2
Space8
Technology34
Tennis1

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