DIHEDRAL, the Angle between the wing reference plane and water line.
上反角，机翼基准面与水线之间的夹角。
2
The dihedral corner reflector with wing and fuselage joint of aircraft is a very strong electromagnetic source in a wide angular range.
飞行器翼身接合部构成的二面角反射器是很强的电磁散射源。
3
The changes in dihedral of front wing and cathedral of rear wing have little effect on longitudinal aerodynamic characteristics but large effect on lateral-directional characteristics.